wifi: iwlwifi: Add RF Step Type for BZ device

Add RF step id handling and handle for BZ device.
Read CNV Aux register and uses for no OTP case.
Add missing rf support for Bz/Bnj device and correct/add
the mapping for rf-type if OTP not present.

Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230414130637.8f2e2fff7bbc.Iee5554178bc5f134dcc28591db0968e619afbdca@changeid


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