[][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/target/linux/mediatek/patches-5.4/400-mtd-add-mtk-snand-driver.patch b/target/linux/mediatek/patches-5.4/400-mtd-add-mtk-snand-driver.patch
new file mode 100644
index 0000000..185c55d
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/400-mtd-add-mtk-snand-driver.patch
@@ -0,0 +1,21 @@
+--- a/drivers/mtd/Kconfig
++++ b/drivers/mtd/Kconfig
+@@ -228,6 +228,8 @@ source "drivers/mtd/ubi/Kconfig"
+ 
+ source "drivers/mtd/hyperbus/Kconfig"
+ 
++source "drivers/mtd/mtk-snand/Kconfig"
++
+ source "drivers/mtd/composite/Kconfig"
+ 
+ endif # MTD
+--- a/drivers/mtd/Makefile
++++ b/drivers/mtd/Makefile
+@@ -33,5 +33,7 @@ obj-$(CONFIG_MTD_SPI_NOR)	+= spi-nor/
+ obj-$(CONFIG_MTD_UBI)		+= ubi/
+ obj-$(CONFIG_MTD_HYPERBUS)	+= hyperbus/
+ 
++obj-$(CONFIG_MTK_SPI_NAND)	+= mtk-snand/
++
+ # Composite drivers must be loaded last
+ obj-y				+= composite/