iwlwifi: iwl-phy-db: Add missing struct member description for 'trans'

Fixes the following W=1 kernel build warning(s):

 drivers/net/wireless/intel/iwlwifi/iwl-phy-db.c:97: warning: Function parameter or member 'trans' not described in 'iwl_phy_db'

Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201126133152.3211309-14-lee.jones@linaro.org

drivers/net/wireless/intel/iwlwifi/iwl-phy-db.c

@@ -25,11 +25,11 @@ struct iwl_phy_db_entry {
  *
  * @cfg: phy configuration.
  * @calib_nch: non channel specific calibration data.
- * @calib_ch: channel specific calibration data.
  * @n_group_papd: number of entries in papd channel group.
  * @calib_ch_group_papd: calibration data related to papd channel group.
  * @n_group_txp: number of entries in tx power channel group.
  * @calib_ch_group_txp: calibration data related to tx power chanel group.
+ * @trans: transport layer
  */
 struct iwl_phy_db {
 	struct iwl_phy_db_entry	cfg;