ramips: Fix booting on MTC WR1201

This fixes the dreaded "lzma error 1" also reported on similar devices
Ref: https://bugs.openwrt.org/index.php?do=details&task_id=3057

Fixes: FS#3057
Signed-off-by: René van Dorst <[email protected]>

target/linux/ramips/image/mt7621.mk

@@ -856,6 +856,7 @@ TARGET_DEVICES += mqmaker_witi
 
 define Device/mtc_wr1201
   $(Device/dsa-migration)
+  $(Device/uimage-lzma-loader)
   IMAGE_SIZE := 16000k
   DEVICE_VENDOR := MTC
   DEVICE_MODEL := Wireless Router WR1201