mediatek: filogic: add support for Cudy AP3000 Outdoor

mediatek: filogic: add support for Cudy AP3000 Outdoor

Hardware highlights:
  - MediaTek MT7981 WiSoC
  - 256MB DDR3 RAM
  - 64MB SPI-NAND
  - MediaTek MT7981 2x2 DBDC 802.11ax 2T2R (2.4 / 5)
  - 1x LED in two colors
  - 2x Button
  - 1x 1GbE
  - Two detachable antenas, two internal pcb antenas
  - PoE powered (standalone)

MAC:
LAN MAC: label mac
2.4G MAC: label mac -1
5G MAC: label mac

How to install:
1. Apply Cudy Intermediate OpenWrt image for AP3000 Outdoor V1
2. Install OpenWrt sysupgrade image

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/16156
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>