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

Clean up kernel-doc in iwl-fh.h. In one case, rename the
(otherwise unused) struct member to have the correct name.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240218194912.4a342ac06f0b.I604ea964a094b43df0ab29b06231c2f42d6bd79b@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>