ramips: adjust Netgear R6120 model name

Adjust the model string and device title to match other Netgear routers
in the ramips target.

Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/ramips/dts/R6120.dts

@@ -7,7 +7,7 @@
 
 / {
 	compatible = "netgear,r6120", "mediatek,mt7628an-soc";
-	model = "Netgear AC1200 R6120";
+	model = "Netgear R6120";
 
 	aliases {
 		led-boot = &led_power;

target/linux/ramips/image/mt76x8.mk

@@ -119,7 +119,7 @@ define Device/netgear_r6120
   DTS := R6120
   BLOCKSIZE := 64k
   IMAGE_SIZE := $(ralink_default_fw_size_16M)
-  DEVICE_TITLE := Netgear AC1200 R6120
+  DEVICE_TITLE := Netgear R6120
   DEVICE_PACKAGES := kmod-mt76x2 kmod-usb2 kmod-usb-ohci
   SERCOMM_HWID := CGQ
   SERCOMM_HWVER := A001