[openwrt/openwrt] ramips: add ASUS RT-AC1200GU as alt name

[LEDE Commits]

mans0n pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/86d019d116c860907c96263ee43425bf637e3bb5

commit 86d019d116c860907c96263ee43425bf637e3bb5
Author: Shiji Yang <yangshiji66 at qq.com>
AuthorDate: Fri Dec 24 14:25:01 2021 +0800

    ramips: add ASUS RT-AC1200GU as alt name
    
    RT-AC57U and RT-AC1200GU are the same models sold in different countries.
    The purpose of this commit is to allow users to easily find the
    corresponding firmware through the model number on the device label.
    
    More specifications: 14e0e4f138e3 ("ramips: add support for ASUS RT-AC57U")
    
    Signed-off-by: Shiji Yang <yangshiji66 at qq.com>
    [reword commit title/message]
    Signed-off-by: Sungbo Eo <mans0n at gorani.run>
---
 target/linux/ramips/image/mt7621.mk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 99884ec1d9..18a29270d7 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -162,6 +162,8 @@ define Device/asus_rt-ac57u
   $(Device/dsa-migration)
   DEVICE_VENDOR := ASUS
   DEVICE_MODEL := RT-AC57U
+  DEVICE_ALT0_VENDOR := ASUS
+  DEVICE_ALT0_MODEL := RT-AC1200GU
   IMAGE_SIZE := 16064k
   DEVICE_PACKAGES := kmod-mt7603 kmod-mt76x2 kmod-usb3 \
 	kmod-usb-ledtrig-usbport