iwlwifi: add missing comments

This patch add comments that escaped from the previous merge

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 7550594..14a1124 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -350,7 +350,7 @@
 	 * For the command queue (#4), allocate command space + one big
 	 * command for scan, since scan command is very huge; the system will
 	 * not have two scans at the same time, so only one is needed.
-	 * For data Tx queues (all other queues), no super-size command
+	 * For normal Tx queues (all other queues), no super-size command
 	 * space is needed.
 	 */
 	len = sizeof(struct iwl4965_cmd) * slots_num;