ramips: update WLAN MAC address of JCG Y2

MAC addresses on OEM firmware:
  04:xx:xx:xx:xx:c8  factory 0x4     wlan2g
  06:xx:xx:xx:xx:c8  [not on flash]  wlan5g

Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>

target/linux/ramips/mt7621/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac

@@ -43,6 +43,10 @@ case "$board" in
 		[ "$PHYNBR" = "1" ] && \
 			macaddr_setbit_la "$(mtd_get_mac_binary Factory 0x4)" > /sys${DEVPATH}/macaddress
 		;;
+	jcg,y2)
+		[ "$PHYNBR" = "1" ] && \
+			macaddr_setbit_la "$(mtd_get_mac_binary factory 0x4)" > /sys${DEVPATH}/macaddress
+		;;
 	linksys,e5600|\
 	linksys,ea6350-v4|\
 	linksys,ea7300-v1|\