ramips: add build support for US/CA/TW variants of Archer AX23v1

[aimacintyre]

Discussion: https://forum.openwrt.org/t/add-support-for-tp-link-ax23-v1/130746/25

The patch added with this commit will need to be removed if OpenWrt backports these changes to 22.03 or Gargoyle moves to a newer OpenWrt branch.

Backported commits:

• https://github.com/openwrt/firmware-utils/commit/6a58f456109008620dd15267a7ff0594095e0d77
• https://github.com/openwrt/firmware-utils/commit/e8191eb7efc2804d33feb18573c96e632a6c1086