bcm63xx: add unmodded SERCOMM AD1018 support

Until now only HW modded SPI flash version was supported.

BCM6328 with 64M RAM and 128M NAND.
More info: https://openwrt.org/toh/sercomm/ad1018

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

target/linux/bcm63xx/base-files/etc/board.d/01_leds

@@ -84,6 +84,7 @@ sagem,fast-2704n)
 sagem,fast-2704-v2)
 	ucidef_set_led_usbdev "usb" "USB" "F@ST2704V2:green:usb" "1-1"
 	;;
+sercomm,ad1018|\
 sercomm,ad1018-nor)
 	ucidef_set_led_netdev "wlan0" "WLAN" "AD1018:green:wifi" "wlan0"
 	;;

target/linux/bcm63xx/base-files/etc/board.d/02_network

@@ -132,6 +132,7 @@ netgear,dgnd3700-v1)
 	ucidef_add_switch "switch0" \
 		"1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1" "0:wan" "8t@eth0"
 	;;
+sercomm,ad1018|\
 sercomm,ad1018-nor)
 	ucidef_add_switch "switch0" \
 		"1:lan:3" "2:lan:2" "3:lan:1" "0:wan" "8t@eth0"

target/linux/bcm63xx/base-files/etc/uci-defaults/09_fix_crc

@@ -40,4 +40,7 @@ case "$(board_name)" in
 	zyxel,p870hw-51a-v2)
 		do_fixcrc
 		;;
+	sercomm,ad1018)
+		mtd erase bootflag2
+		;;
 esac