Add support for AX210/AX211 devices to iwx(4).

Add support for AX210/AX211 devices to iwx(4).

Firmware is available in fw_update(8) as of iwx-firmware-20220110.

Tested for regressions on AX200/AX201 by jmc, kettenis, and myself.

Tested on AX210 by abieber (framework laptop) and myself, both using
a device which loads ty-ao-gf-a0 firmware.
AX210/AX211 devices which load the following firmware files should
work but could not yet be tested due to lack of hardware:
iwx-so-a0-gf-a0-67, iwx-so-a0-gf4-a0-67, iwx-so-a0-jf-b0-64