Switch iwx(4) to new -67 firmware images.

Switch iwx(4) to new -67 firmware images.

iwx-firmware-20211101 must be installed with fw_update(1) before
booting a new kernel. sysupgrade(8) will take care of this.

Intel has published a related security advisory:
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00509.html

iwx(4) devices which are using the iwx-Qu-c0-hr-b0-63 image did
not receive a firmware update. I have no idea why.

Tested:
ax200: jmc, stsp, Matthias Schmidt
ax201: fkr, stsp