bmips: add support for Sercomm AD1018

The Sercomm AD1018 is a wifi fast ethernet router, 2.4 GHz single band with
two internal antennas.

Hardware:
 - SoC: Broadcom BCM6328
 - CPU: single core BMIPS4350 @ 320Mhz
 - RAM: 64 MB (v1) / 128 MB (v2) DDR
 - Flash: 128 MB NAND
 - Ethernet LAN: 4x 100Mbit
 - Wifi 2.4 GHz: miniPCI Broadcom BCM43217 802.11bgn
 - USB: 1x 2.0
 - Buttons: 3x (reset)
 - LEDs: yes
 - UART: yes

Installation via OEM web UI:
  1. Use the admin credentials to login via web UI
  2. Go to Managament->Update firmware and select the OpenWrt CFE firmware
  3. Press "Update Firmware" button and wait some minutes until it finish

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

target/linux/bmips/bcm6328/base-files/etc/board.d/01_leds

@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+. /lib/functions/leds.sh
+. /lib/functions/uci-defaults.sh
+
+board_config_update
+
+case "$(board_name)" in
+sercomm,ad1018)
+	ucidef_set_led_usbport "usb" "USB" "green:usb" "usb1-port1" "usb2-port1"
+	;;
+esac
+
+board_config_flush
+
+exit 0

target/linux/bmips/bcm6328/base-files/etc/board.d/02_network

@@ -10,6 +10,10 @@ comtrend,ar-5387un)
 	ucidef_set_bridge_device switch
 	ucidef_set_interface_lan "lan1 lan2 lan3 lan4"
 	;;
+sercomm,ad1018)
+	ucidef_set_bridge_device switch
+	ucidef_set_interface_lan "lan1 lan2 lan3 fibre"
+	;;
 esac
 
 board_config_flush

target/linux/bmips/bcm6328/base-files/lib/upgrade/platform.sh

@@ -9,6 +9,9 @@ platform_check_image() {
 
 platform_do_upgrade() {
 	case "$(board_name)" in
+	sercomm,ad1018)
+		nand_do_upgrade "$1"
+		;;
 	*)
 		default_do_upgrade "$1"
 		;;