mediatek: update uboot to latest patchset provided by MTK

MTK sent us their latest version of the staging uboot. Lets merge the patches.

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

package/boot/uboot-mediatek/patches/010-no-binman.patch

@@ -1,11 +1,9 @@
---- a/Makefile
-+++ b/Makefile
-@@ -1667,8 +1667,10 @@ u-boot-elf.lds: arch/u-boot-elf.lds prepare FORCE
+--- a/Makefile	2020-10-13 13:39:06.471438591 +0800
++++ b/Makefile	2020-10-13 13:39:39.190798462 +0800
+@@ -1725,6 +1725,10 @@
+ 
  ifeq ($(CONFIG_SPL),y)
  spl/u-boot-spl-mtk.bin: spl/u-boot-spl
- 
--u-boot-mtk.bin: u-boot.dtb u-boot.img spl/u-boot-spl-mtk.bin FORCE
--	$(call if_changed,binman)
 +OBJCOPYFLAGS_u-boot-mtk.bin = -I binary -O binary \
 +			--pad-to=$(CONFIG_SPL_PAD_TO) --gap-fill=0xff
 +u-boot-mtk.bin: u-boot.img spl/u-boot-spl-mtk.bin FORCE