wifi: iwlwifi: debug: set CDB indication from CSR

In order to set the CDB indication in the dump meta data, we read it from
a specific prph register.
There is a known issue with that register in Xnj setups - in that case it
will always indicate CDB.
Instead of detecting the jacket case and then hardcode whether the CDB
indication should or shouldn't be set (according the CRF),
we can retrieve the CDB bit from the hw_rf_id (CSR_HW_RF_ID).
There is also no reason to do it conditionally only for ax210 / BnJ.
Cleanup the code a bit.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Link: https://patch.msgid.link/20250505215513.ea542a6c189e.I3d8cf5103b3747dfdd89985b45b592e419f97b63@changeid


Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>