mvebu: uDPU: drop patch compiling dtb

If device recipe has specified DEVICE_DTS variable, the dtb is built
anyway by OpenWrt buildroot image rules. Drop the patch and adjust the
location of compiled dtb.

Cc: Scott Roberts <ttocsr@gmail.com>
Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>

target/linux/mvebu/image/cortexa53.mk

@@ -60,7 +60,7 @@ define Device/methode_udpu
   DEVICE_MODEL := micro-DPU (uDPU)
   DEVICE_DTS := armada-3720-uDPU
   KERNEL_LOADADDR := 0x00080000
-  KERNEL_INITRAMFS := kernel-bin | gzip | fit gzip $$(DTS_DIR)/$$(DEVICE_DTS).dtb
+  KERNEL_INITRAMFS := kernel-bin | gzip | fit gzip $$(KDIR)/image-$$(DEVICE_DTS).dtb
   KERNEL_INITRAMFS_SUFFIX := .itb
   DEVICE_PACKAGES += f2fs-tools fdisk kmod-i2c-pxa
   IMAGE_NAME = $$(IMAGE_PREFIX)-$$(2)

target/linux/mvebu/patches-4.19/530-add_armada-3820-uDPU-dts.patch

@@ -1,10 +0,0 @@
---- a/arch/arm64/boot/dts/marvell/Makefile
-+++ b/arch/arm64/boot/dts/marvell/Makefile
-@@ -2,6 +2,7 @@
- # Mvebu SoC Family
- dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-db.dtb
- dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-espressobin.dtb
-+dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-uDPU.dtb
- dtb-$(CONFIG_ARCH_MVEBU) += armada-7040-db.dtb
- dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-db.dtb
- dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-mcbin.dtb