ramips: rename PSG1218 to match label

Fix previous commit to be less ambigous:
PSG1218 rev.A = 5 ports, external PA, heatsinks
PSG1218 rev.B = 4 ports, internal PA, no heatsinks

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

target/linux/ramips/base-files/etc/board.d/01_leds

@@ -287,8 +287,8 @@ pbr-m1)
 psg1208)
 	set_wifi_led "$board:white:wlan2g"
 	;;
-psg1218\|
-psg1218k2c)
+psg1218a\|
+psg1218b)
 	ucidef_set_led_netdev "Network" "Network" "$board:blue:status" "eth0"
 	ucidef_set_led_default "status" "STATUS" "$board:yellow:status" "0"
 	;;

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

@@ -95,7 +95,7 @@ ramips_setup_interfaces()
 	oy-0001|\
 	pbr-m1|\
 	psg1208|\
-	psg1218k2c|\
+	psg1218a|\
 	r6220|\
 	sap-g3200u3|\
 	sk-wb8|\
@@ -115,7 +115,7 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "6@eth0"
 		;;
-	psg1218)
+	psg1218b)
 		ucidef_add_switch "switch0" \
 			"0:lan:3" "1:lan:2" "2:lan:1" "3:wan" "6@eth0"
 		;;

target/linux/ramips/base-files/etc/diag.sh

@@ -104,8 +104,8 @@ get_status_led() {
 	psg1208)
 		status_led="$board:white:wps"
 		;;
-	psg1218|\
-	psg1218k2c)
+	psg1218a|\
+	psg1218b)
 		status_led="$board:yellow:status"
 		;;
 	cy-swr1100|\