iwlwifi: pcie: use bool for TX queue where appropriate

Instead of using u8 to hold logic values, use bool.

Also fix a comment, the return value is no longer relevant.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/pcie/internal.h b/drivers/net/wireless/iwlwifi/pcie/internal.h
index 477ac36..1261a41 100644
--- a/drivers/net/wireless/iwlwifi/pcie/internal.h
+++ b/drivers/net/wireless/iwlwifi/pcie/internal.h
@@ -231,7 +231,7 @@
 	spinlock_t lock;
 	struct timer_list stuck_timer;
 	struct iwl_trans_pcie *trans_pcie;
-	u8 need_update;
+	bool need_update;
 	u8 active;
 	bool ampdu;
 };