ramips: add missing DEVICE_VENDOR

Fixes commit ee66fe4ea9a6f5e3f47a063f850bac57e1fb411a
Signed-off-by: Daniel Golle <[email protected]>

target/linux/ramips/image/mt7620.mk

@@ -837,7 +837,7 @@ TARGET_DEVICES += wrh-300cr
 define Device/wrtnode
   DTS := WRTNODE
   IMAGE_SIZE := $(ralink_default_fw_size_16M)
-  DEVICE_VENDOR := 
+  DEVICE_VENDOR := WRTNode
   DEVICE_MODEL := WRTNode
   DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci
 endef