firmware: extract prism54-firmware into own package

Instead of downloading the firmware for prism54 devices in the
wireless.mk do it in an extra package Makefile. To ship the complete
source code Intel ships our modified OpenWrt/LEDE + the content of the
dl directory. We do not want to have any files in the dl/ directory
which are not needed to build our images. The prism54 gets downloaded
every time independently of building kmod-net-prism54 or not. When it
is in a own package it only gets downloaded when the firmware package
is selected.

Signed-off-by: Hauke Mehrtens <hauke.mehrtens@intel.com>

package/firmware/prism54-firmware/Makefile

@@ -0,0 +1,39 @@
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=prism54-firmware
+PKG_VERSION:=1.0.4.3
+PKG_RELEASE:=1
+
+# Prism54 FullMAC firmware (jbnore.free.fr seems to be rather slow, so we use daemonizer.de)
+PKG_SOURCE:=$(PKG_VERSION).arm
+PKG_SOURCE_URL:=https://daemonizer.de/prism54/prism54-fw/fw-fullmac/
+PKG_MD5SUM:=8bd4310971772a486b9784c77f8a6df9
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/prism54-firmware
+  SECTION:=firmware
+  CATEGORY:=Firmware
+  URL:=https://daemonizer.de/prism54/prism54-fw
+  TITLE:=prism54 firmware
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+endef
+
+define Build/Compile
+
+endef
+
+define Package/prism54-firmware/install
+	$(INSTALL_DIR) $(1)/lib/firmware
+	$(INSTALL_DATA) $(DL_DIR)/$(PKG_SOURCE) $(1)/lib/firmware/isl3890
+endef
+
+$(eval $(call BuildPackage,prism54-firmware))

package/kernel/linux/modules/wireless.mk

@@ -10,7 +10,7 @@ WIRELESS_MENU:=Wireless Drivers
 define KernelPackage/net-prism54
   SUBMENU:=$(WIRELESS_MENU)
   TITLE:=Intersil Prism54 support
-  DEPENDS:=@PCI_SUPPORT +@DRIVER_WEXT_SUPPORT
+  DEPENDS:=@PCI_SUPPORT +@DRIVER_WEXT_SUPPORT +prism54-firmware
   KCONFIG:=CONFIG_PRISM54
   FILES:= \
 	$(LINUX_DIR)/drivers/net/wireless/prism54/prism54.ko@lt4.5 \
@@ -22,21 +22,6 @@ define KernelPackage/net-prism54/description
  Kernel modules for Intersil Prism54 support
 endef
 
-# Prism54 FullMAC firmware (jbnore.free.fr seems to be rather slow, so we use daemonizer.de)
-PRISM54_FW:=1.0.4.3.arm
-
-define Download/net-prism54
-  FILE:=$(PRISM54_FW)
-  URL:=http://daemonizer.de/prism54/prism54-fw/fw-fullmac/
-  MD5SUM:=8bd4310971772a486b9784c77f8a6df9
-endef
-
-define KernelPackage/net-prism54/install
-	$(INSTALL_DIR) $(1)/lib/firmware
-	$(INSTALL_DATA) $(DL_DIR)/$(PRISM54_FW) $(1)/lib/firmware/isl3890
-endef
-
-$(eval $(call Download,net-prism54))
 $(eval $(call KernelPackage,net-prism54))