[][mt7986: Add emmc image]

[Description]
Add mmc image, enable related kernel options and dts.

[Release-log]
N/A

Change-Id: I1727e72b19c67f971d9fab00f12ef6456dccc70d
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4632363
diff --git a/target/linux/mediatek/mt7986/config-5.4 b/target/linux/mediatek/mt7986/config-5.4
index 7df3763..2e27823 100644
--- a/target/linux/mediatek/mt7986/config-5.4
+++ b/target/linux/mediatek/mt7986/config-5.4
@@ -52,6 +52,7 @@
 CONFIG_AUDIT_ARCH_COMPAT_GENERIC=y
 CONFIG_BLK_DEV_DM=y
 CONFIG_BLK_DEV_DM_BUILTIN=y
+CONFIG_BLK_DEV_LOOP=y
 # CONFIG_BLK_DEV_MD is not set
 CONFIG_BLK_DEV_SD=y
 CONFIG_BLK_MQ_PCI=y
@@ -281,6 +282,7 @@
 CONFIG_MFD_SYSCON=y
 CONFIG_MIGRATION=y
 CONFIG_MMC=y
+CONFIG_MMC_BLOCK=y
 CONFIG_MMC_MTK=y
 CONFIG_MODULES_TREE_LOOKUP=y
 CONFIG_MODULES_USE_ELF_RELA=y