ramips: add support for ipTIME A3
ipTIME A3 is a 2.4/5GHz band AC1200 router, based on MediaTek
MT7628AN.
Specifications:
- SoC: MT7628AN
- RAM: DDR2 64MB
- Flash: SPI NOR 8MB
- WiFi:
- 2.4GHz: SoC internal
- 5GHz: MT7612EN
- Ethernet: 3x 10/100Mbps
- Switch: SoC internal
- UART:
- J1: 3.3V, TX, RX, GND (3.3V is the square pad) / 57600 8N1
Installation via web interface:
1. Flash **initramfs** image through the stock web interface.
2. Boot into OpenWrt and perform sysupgrade with sysupgrade image.
Revert to stock firmware:
1. Perform sysupgrade with stock image.
Signed-off-by: Sungbo Eo <mans0n@gorani.run>