iwlwifi: fw: dbg: Fix misspelling of 'reg_data' in function header

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

 drivers/net/wireless/intel/iwlwifi/fw/dbg.c:1932: warning: Function parameter or member 'reg_data' not described in 'iwl_dump_ini_mem'
 drivers/net/wireless/intel/iwlwifi/fw/dbg.c:1932: warning: Excess function parameter 'reg' description in 'iwl_dump_ini_mem'

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: Shahar S Matityahu <shahar.s.matityahu@intel.com>
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/20201126133152.3211309-15-lee.jones@linaro.org

drivers/net/wireless/intel/iwlwifi/fw/dbg.c

@@ -1924,7 +1924,7 @@ struct iwl_dump_ini_mem_ops {
  *
  * @fwrt: fw runtime struct
  * @list: list to add the dump tlv to
- * @reg: memory region
+ * @reg_data: memory region
  * @ops: memory dump operations
  */
 static u32 iwl_dump_ini_mem(struct iwl_fw_runtime *fwrt, struct list_head *list,