ramips: add alternative name to Etisalat (Sercomm) S3

This commit adds alternative name to Etisalat (Sercomm) S3 router.

Signed-off-by: Mikhail Zhilkin <[email protected]>

target/linux/ramips/image/mt7621.mk

@@ -1093,6 +1093,8 @@ define Device/etisalat_s3
   SERCOMM_SWVER := 4009
   DEVICE_VENDOR := Etisalat
   DEVICE_MODEL := S3
+  DEVICE_ALT0_VENDOR := Sercomm
+  DEVICE_ALT0_MODEL := S3
   DEVICE_PACKAGES := kmod-mt7603 kmod-mt7615-firmware kmod-usb3
 endef
 TARGET_DEVICES += etisalat_s3