ramips: mt7621: mikrotik rb760igs: Include "hEX S" in model name

Mikrotik seems to prefer "hEX S" as general name for this model,
therefore include this in devicetree model name as well.

Signed-off-by: Priit Laes <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/16658
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/ramips/dts/mt7621_mikrotik_routerboard-760igs.dts

@@ -4,7 +4,7 @@
 
 / {
 	compatible = "mikrotik,routerboard-760igs", "mediatek,mt7621-soc";
-	model = "MikroTik RouterBOARD 760iGS";
+	model = "MikroTik RouterBOARD 760iGS (hEX S)";
 
 	aliases {
 		led-boot = &led_pwr;