[][Add initial mtk feed for OpenWRT v21.02]

[Description]
Add initial mtk feed for OpenWRT v21.02

[Release-log]
N/A

Change-Id: I8051c6ba87f1ccf26c02fdd88a17d66f63c0b101
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4495320
diff --git a/openwrt_patches/200-mt7621-modify-image-load-address.patch b/openwrt_patches/200-mt7621-modify-image-load-address.patch
new file mode 100644
index 0000000..6c85a34
--- /dev/null
+++ b/openwrt_patches/200-mt7621-modify-image-load-address.patch
@@ -0,0 +1,11 @@
+--- a/target/linux/ramips/image/Makefile
++++ b/target/linux/ramips/image/Makefile
+@@ -16,7 +16,7 @@ DEVICE_VARS += SERCOMM_PAD JCG_MAXSIZE
+ 
+ loadaddr-y := 0x80000000
+ loadaddr-$(CONFIG_TARGET_ramips_rt288x) := 0x88000000
+-loadaddr-$(CONFIG_TARGET_ramips_mt7621) := 0x80001000
++loadaddr-$(CONFIG_TARGET_ramips_mt7621) := 0x81001000
+ 
+ ldrplatform-y := ralink
+ ldrplatform-$(CONFIG_TARGET_ramips_mt7621) := mt7621