wifi: iwlwifi: Remove old device data

The last use of iwl_ax204_name[], iwl_ax221_name[] and iwl_cfg_so_a0_ms_a0
was removed by
commit f473a7fd ("wifi: iwlwifi: remove devices that never came out")

Remove them.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://patch.msgid.link/20241223013202.340180-7-linux@treblig.org