ramips: mt7621: use lzma-loader for newifi d1/d2/thunder timecloud

These devices failed to properly extract kernel. enable lzma loader
for them.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>

target/linux/ramips/image/mt7621.mk

@@ -229,6 +229,7 @@ endef
 TARGET_DEVICES += dlink_dir-860l-b1
 
 define Device/d-team_newifi-d2
+  $(Device/uimage-lzma-loader)
   IMAGE_SIZE := 32448k
   DEVICE_VENDOR := Newifi
   DEVICE_MODEL := D2
@@ -460,6 +461,7 @@ endef
 TARGET_DEVICES += jcg_jhr-ac876m
 
 define Device/lenovo_newifi-d1
+  $(Device/uimage-lzma-loader)
   IMAGE_SIZE := 32448k
   DEVICE_VENDOR := Newifi
   DEVICE_MODEL := D1
@@ -746,6 +748,7 @@ endef
 TARGET_DEVICES += telco-electronics_x1
 
 define Device/thunder_timecloud
+  $(Device/uimage-lzma-loader)
   IMAGE_SIZE := 16064k
   DEVICE_VENDOR := Thunder
   DEVICE_MODEL := Timecloud