mediatek: backport upstream mediatek patches

Signed-off-by: John Crispin <john@phrozen.org>

target/linux/mediatek/image/Makefile

@@ -1,10 +1,42 @@
+#
+# Copyright (C) 2012-2015 OpenWrt.org
+# Copyright (C) 2016-2017 LEDE project
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
 include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/image.mk
 
-include $(SUBTARGET).mk
+# for arm
+KERNEL_LOADADDR := 0x80008000
+
+# build dtb
+define Build/dtb
+        $(call Image/BuildDTB,$(DEVICE_DTS_DIR)/$(DEVICE_DTS).dts,$(DEVICE_DTS_DIR)/$(DEVICE_DTS).dtb)
+	$(CP) $(DEVICE_DTS_DIR)/$(DEVICE_DTS).dtb $(BIN_DIR)/
+endef
+
+# default all platform image(fit) build 
+define Device/Default
+  PROFILES = Default $$(DEVICE_NAME)
+  KERNEL_NAME := zImage
+  FILESYSTEMS := squashfs
+  DEVICE_DTS_DIR := $(DTS_DIR)
+  IMAGES := sysupgrade.bin
+  IMAGE/sysupgrade.bin := append-kernel | append-rootfs | pad-rootfs | append-metadata 
+  KERNEL_NAME := zImage
+  KERNEL := dtb | kernel-bin | append-dtb | uImage none
+  KERNEL_INITRAMFS := dtb | kernel-bin | append-dtb | uImage none
+endef
+
+ifeq ($(SUBTARGET),mt7623)
+include mt7623.mk
+endif
 
 define Image/Build
 	$(call Image/Build/$(1),$(1))
 endef
 
 $(eval $(call BuildImage))
+