[][MT7988][Update mtk_factor_rw.sh]

[Description]
Add MT7988 case to the mtk_factory_rw.sh.

0x000000180000-0x000000380000 : "Factory"
=> The MAC address are located at 0x27FFF4~0x27FFFF.

[Release-log]
N/A

Change-Id: I69c1f06fbf0268021b3b17332555f942148de623
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6316994
diff --git a/feed/mtk_factory_rw/files/mtk_factory_rw.sh b/feed/mtk_factory_rw/files/mtk_factory_rw.sh
index 7657260..e5bd47e 100755
--- a/feed/mtk_factory_rw/files/mtk_factory_rw.sh
+++ b/feed/mtk_factory_rw/files/mtk_factory_rw.sh
@@ -46,6 +46,11 @@
 		lan_mac_offset=0x1F800
 		wan_mac_offset=0x1F806
 		;;
+	*7988*)
+		#2560k - 12 byte
+		lan_mac_offset=0x27FFF4
+		wan_mac_offset=0x27FFFA
+		;;
 	*)
 		lan_mac_offset=0x2A
 		wan_mac_offset=0x24