wifi: iwlwifi: remove support of A0 version of FM RF

Remove the support for A0 step of latest wifi-7
FM RF as it is no longer supported.

Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230621130444.269d55ffbc8e.I4740f32c3d95d4474a82cc153891c92b9bc465db@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>