wifi: iwlwifi: fix kernel-doc in iwl-fh.h

Some blocks aren't really kernel-doc, and some are misformatted
or with mismatched names. Fix that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240625194805.16865e5503ac.I5401edbf9ecbc25e07aad929bb56255410173711@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>