mediatek: add bpi-r64 emmc support

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

target/linux/mediatek/mt7622/base-files/lib/preinit/79_move_config

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+. /lib/upgrade/common.sh
+
+RECOVERY_PART=/dev/mmcblk0p6
+
+move_config() {
+	if [ -b $RECOVERY_PART ]; then
+		insmod nls_cp437
+		insmod nls_iso8859-1
+		insmod fat
+		insmod vfat
+		mkdir -p /recovery
+		mount -o rw,noatime $RECOVERY_PART /recovery
+		[ -f "/recovery/$BACKUP_FILE" ] && mv -f "/recovery/$BACKUP_FILE" /
+		umount /recovery
+	fi
+}
+
+boot_hook_add preinit_mount_root move_config