Revert "bcm27xx-gpu-fw: update to latest version"

This reverts commit 9e467a764b.

The Raspberry Pi firmware recently switched to building from the common
firmware branch. This introduces changes in the core clock handling,
causing various issues.

E.g. enable_uart=1 no longer fixes the core clock frequency to 250MHz.
When the disable-bt DT overlay is not loaded, the core clock frequency
is increased to 400MHz. As a result, the UART baud rate is no longer
correct, and this causes garbled serial console, or communication
problems with HATs that use the UART.

As a workaround, the core clock could be fixed to 250MHz by adding
'core_freq=250' in /boot/config.txt, but as there appear to be other
issues than just the UART being broken, the safer bet is to revert the
firmware for now.

Upstream bug: https://github.com/raspberrypi/firmware/issues/1376

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>

package/kernel/bcm27xx-gpu-fw/Makefile

@@ -2,8 +2,8 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=bcm27xx-gpu-fw
-PKG_VERSION:=2020-05-27
-PKG_RELEASE:=62fc8c01165a80021054a430182b504f7b877c2d
+PKG_VERSION:=2020-03-26
+PKG_RELEASE:=5574077183389cd4c65077ba18b59144ed6ccd6d
 
 PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/$(PKG_NAME)/rpi-firmware-$(PKG_RELEASE)
 
@@ -26,7 +26,7 @@ define Download/bootcode_bin
   FILE:=$(RPI_FIRMWARE_FILE)-bootcode.bin
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=bootcode.bin
-  HASH:=12c6b5fdd893ff60cddbad0fa8aea0ebd5328ed2a9cd39a2a09d7ac99621d5bf
+  HASH:=1e3582640b97f6a1ba77b66181fe698767d205f5d4c4315f56d03b398a7e55d1
 endef
 $(eval $(call Download,bootcode_bin))
 
@@ -34,7 +34,7 @@ define Download/fixup_dat
   FILE:=$(RPI_FIRMWARE_FILE)-fixup.dat
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=fixup.dat
-  HASH:=25d39e703af377ca6412c0ac68e6739d2ffb56634b9a7262140d26d8150fdf23
+  HASH:=1b90af0c87d5f705b5b6d921b2b47d37f73af81c5c9fb1d683201e619a00d2df
 endef
 $(eval $(call Download,fixup_dat))
 
@@ -42,7 +42,7 @@ define Download/fixup_cd_dat
   FILE:=$(RPI_FIRMWARE_FILE)-fixup_cd.dat
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=fixup_cd.dat
-  HASH:=9639f81ad007561048bb3956e88da425a84cef37f307a16734cdcfcdcbd40b4c
+  HASH:=134c5f3db2de3e5fd285bd4073016f074cf4151cdd1bfe3443b9a14700d48a55
 endef
 $(eval $(call Download,fixup_cd_dat))
 
@@ -50,7 +50,7 @@ define Download/fixup_x_dat
   FILE:=$(RPI_FIRMWARE_FILE)-fixup_x.dat
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=fixup_x.dat
-  HASH:=538c4d514b55c09670bbc7bdc092e44ff1f572c4f124a47c5b514f120dff6263
+  HASH:=32fd8182a9a603f41acb7d542cbb15aa4e84c2768816ae48e36b68d0d4e1754c
 endef
 $(eval $(call Download,fixup_x_dat))
 
@@ -58,7 +58,7 @@ define Download/fixup4_dat
   FILE:=$(RPI_FIRMWARE_FILE)-fixup4.dat
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=fixup4.dat
-  HASH:=75312421da0e036f9d451facb848bd439247e4322ee2d36bbfe2f7acc9a6d681
+  HASH:=605b28219ba13b73dbf57a45e995e7ea090421ad96a971c950afb34e0d3f7841
 endef
 $(eval $(call Download,fixup4_dat))
 
@@ -66,7 +66,7 @@ define Download/fixup4cd_dat
   FILE:=$(RPI_FIRMWARE_FILE)-fixup4cd.dat
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=fixup4cd.dat
-  HASH:=9639f81ad007561048bb3956e88da425a84cef37f307a16734cdcfcdcbd40b4c
+  HASH:=a3a4c600472032cd6597e774f0b7be2cebbfa918ccfd7fa1cfecdf853c5f61a9
 endef
 $(eval $(call Download,fixup4cd_dat))
 
@@ -74,7 +74,7 @@ define Download/fixup4x_dat
   FILE:=$(RPI_FIRMWARE_FILE)-fixup4x.dat
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=fixup4x.dat
-  HASH:=d3d1a044412a22a7c366d57e79433532e137e9b184ea9ea68b0eb7577e70e4f3
+  HASH:=c196692b2cac949fdeb354364eb15da83d192d77ab698cf3fe43142401c5281c
 endef
 $(eval $(call Download,fixup4x_dat))
 
@@ -82,7 +82,7 @@ define Download/start_elf
   FILE:=$(RPI_FIRMWARE_FILE)-start.elf
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=start.elf
-  HASH:=5980340e652491926f263ac89b7bc2ab513246bd3eb27103bba4780d6e8568f8
+  HASH:=2364737aade5c6459a0dfd7b5d5070ab6a6139803779d3f94b579744b40731a5
 endef
 $(eval $(call Download,start_elf))
 
@@ -90,7 +90,7 @@ define Download/start_cd_elf
   FILE:=$(RPI_FIRMWARE_FILE)-start_cd.elf
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=start_cd.elf
-  HASH:=389a44e371802207ed56fe82a3beaf675eb51176112bde7d77546039d7085572
+  HASH:=12b98b6c5336b4f1ee1a61753bd6471ce7ce8ee2644550dc79c8e41d3ee4e719
 endef
 $(eval $(call Download,start_cd_elf))
 
@@ -98,7 +98,7 @@ define Download/start_x_elf
   FILE:=$(RPI_FIRMWARE_FILE)-start_x.elf
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=start_x.elf
-  HASH:=32016c544353b285394f0006d57a785239fee0262ed1b0ff80b8028c918f0ad9
+  HASH:=d21ece84f1ac70148787578ec7549a01d5fa7453b46119ab230470f8e403c0f9
 endef
 $(eval $(call Download,start_x_elf))
 
@@ -106,7 +106,7 @@ define Download/start4_elf
   FILE:=$(RPI_FIRMWARE_FILE)-start4.elf
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=start4.elf
-  HASH:=ec26d746ddf76527b1702fbf7e76c7b036545cc43da81361a2887c92e4965dcc
+  HASH:=98c4cba6bd4ee03a53b02816c645f783becd9f9899787f7b1bcb8a784eeca4c0
 endef
 $(eval $(call Download,start4_elf))
 
@@ -114,7 +114,7 @@ define Download/start4cd_elf
   FILE:=$(RPI_FIRMWARE_FILE)-start4cd.elf
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=start4cd.elf
-  HASH:=ee507a448911a9d82edf632decb160d5712ab43d8d32b1225f1c406d4eb87820
+  HASH:=b9ee5a895563b891a74ac4be3e9e11be553aa69d600a196556328db164735f8a
 endef
 $(eval $(call Download,start4cd_elf))
 
@@ -122,7 +122,7 @@ define Download/start4x_elf
   FILE:=$(RPI_FIRMWARE_FILE)-start4x.elf
   URL:=$(RPI_FIRMWARE_URL)
   URL_FILE:=start4x.elf
-  HASH:=9a32a06aadeb84649ee03a15f067fa9285791488ffe61b82f9788303a1355614
+  HASH:=bd2741aca11ecface061fd93d6b412d4f2a777165d780f5a2924569c9417ed92
 endef
 $(eval $(call Download,start4x_elf))