ramips: fix ASUS WL-330N3G MAC address

The ASUS WL-330N and WL-330N3G has the MAC address stored at
offset 4, not 40. This is verified by reading original ASUS
firmware GPL_WL-330N3G_source.1028/user/rc/common_ex.c and
GPL_WL-330N_source.1021/user/rc/common_ex.c.

Tested on WL-330N3G, it now gets the same MAC as is printed on
the label on the router.

Signed-off-by: Jan Kardell <jan.kardell@arkub.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34877 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ramips/base-files/lib/preinit/06_set_iface_mac

@@ -8,7 +8,9 @@ preinit_set_mac_address() {
 	. /lib/ramips.sh
 
 	case $(ramips_board_name) in
-	3g-6200n)
+	3g-6200n |\
+	wl-330n |\
+	wl-330n3g)
 		mac=$(ramips_get_mac_binary factory 4)
 		ifconfig eth0 hw ether $mac 2>/dev/null
 		;;
@@ -54,8 +56,6 @@ preinit_set_mac_address() {
 	tew-692gr |\
 	w306r-v20 |\
 	w502u    |\
-	wl-330n |\
-	wl-330n3g |\
 	wr6202 |\
 	xdxrn502j)
 		mac=$(ramips_get_mac_binary factory 40)