ramips: correct/add Phicomm K2x WAN/label MAC address

Phicomm K2G:
add missing label_mac

Phicomm PSG1218A & PSG1218B:
The previous wan mac was set as factory@0x28 +1 (originally based
on the default case for the ramips target), but the correct wan mac
is factory@0x28 -1, being equal to factory@0x2e.

Signed-off-by: Shiji Yang <[email protected]>
[minor commit title/message adjustments]
Signed-off-by: Adrian Schmutzler <[email protected]>

target/linux/ramips/mt7620/base-files/etc/board.d/02_network

@@ -264,8 +264,6 @@ ramips_setup_macs()
 		;;
 	alfa-network,ac1200rm|\
 	dlink,dir-810l|\
-	phicomm,psg1218a|\
-	phicomm,psg1218b|\
 	trendnet,tew-810dr)
 		wan_mac=$(macaddr_add "$(mtd_get_mac_binary factory 0x28)" 1)
 		;;
@@ -328,14 +326,16 @@ ramips_setup_macs()
 	iptime,a104ns)
 		wan_mac=$(macaddr_add "$(mtd_get_mac_binary u-boot 0x1fc20)" 2)
 		;;
-	lb-link,bl-w1200)
+	lb-link,bl-w1200|\
+	phicomm,k2g|\
+	phicomm,psg1218a|\
+	phicomm,psg1218b)
 		wan_mac=$(mtd_get_mac_binary factory 0x2e)
 		label_mac=$wan_mac
 		;;
 	lenovo,newifi-y1|\
 	lenovo,newifi-y1s|\
 	ohyeah,oy-0001|\
-	phicomm,k2g|\
 	wavlink,wl-wn530hg4)
 		wan_mac=$(mtd_get_mac_binary factory 0x2e)
 		;;