ramips-mt76x8: Add support for Xiaomi Mi Router 4A (100M International Edition v2 - R4ACv2) - closes #3183

[ChristianMiddendorf]

• Must be flashable from vendor firmware
  • Web interface
  • TFTP
  • Other: <sysupgrade -n from OpenWRT 24.10rc5>
• Must support upgrade mechanism
  • Must have working sysupgrade
    • Must keep/forget configuration (sysupgrade [-n], firstboot)
  • Gluon profile name matches autoupdater image name
    (lua -e 'print(require("platform_info").get_image_name())')
• Reset/WPS/... button must return device into config mode
• Primary MAC address should match address on device label (or packaging)
  (https://gluon.readthedocs.io/en/latest/dev/hardware.html#hardware-support-in-packages)
  • When re-adding a device that was supported by an earlier version of Gluon, a
    factory reset must be performed before checking the primary MAC address, as
    the setting from the old version is not reset otherwise.
• Wired network
  • should support all network ports on the device
  • must have correct port assignment (WAN/LAN)
    • if there are multiple ports but no WAN port:
      • the PoE input should be WAN, all other ports LAN
      • otherwise the first port should be declared as WAN, all other ports LAN
• Wireless network (if applicable)
  • Association with AP must be possible on all radios
  • Association with 802.11s mesh must work on all radios
  • AP+mesh mode must work in parallel on all radios
• LED mapping
  • Power/system LED
    • Lit while the device is on
    • Should display config mode blink sequence
      (https://gluon.readthedocs.io/en/latest/features/configmode.html)
  • Radio LEDs
    • Should map to their respective radio
    • Should show activity
  • Switch port LEDs
    • Should map to their respective port (or switch, if only one led present)
    • Should show link state and activity
• Outdoor devices only:
  • Added board name to is_outdoor_device function in package/gluon-core/luasrc/usr/lib/lua/gluon/platform.lua
• Cellular devices only:
  • Added board name to is_cellular_device function in package/gluon-core/luasrc/usr/lib/lua/gluon/platform.lua
  • Added board name with modem setup function setup_ncm_qmi to package/gluon-core/luasrc/lib/gluon/upgrade/250-cellular
• Docs:
  • Added Device to docs/user/supported_devices.rst

[AiyionPrime]

I'll look into this after work

[AiyionPrime]

Thanks for your contribution :)

Assuming the checklist went all well,
I'd suggest the changes above and afterwords squashing the three commits into a clean one with a proper commit message, which would be sth. like
<target-name>: Add support for <vendor-name> <device-name>

and just to avoid the blip: Contrary to the current PR title the vendor is called Xiaomi.

Aside that this looks fine to me. Have a good night everyone!

[rotanid]

@AiyionPrime please check the PR again, your Request blocks the merge :)