wifi: iwlwifi: fw: api: fix memory region kernel-doc

Add the missing special_mem union member and use constant
formatting (%) for the type constants.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240703125541.9344b2b94d45.Id770b4f1893308ba43fc039a8851c526312ad2b5@changeid


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