mac80211: convert HW flags to unsigned long bitmap

As we're running out of hardware capability flags pretty quickly,
convert them to use the regular test_bit() style unsigned long
bitmaps.

This introduces a number of helper functions/macros to set and to
test the bits, along with new debugfs code.

The occurrences of an explicit __clear_bit() are intentional, the
drivers were never supposed to change their supported bits on the
fly. We should investigate changing this to be a per-frame flag.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c
index ac6ad62..06b60980 100644
--- a/net/mac80211/pm.c
+++ b/net/mac80211/pm.c
@@ -23,7 +23,7 @@
 
 	ieee80211_del_virtual_monitor(local);
 
-	if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
+	if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
 		mutex_lock(&local->sta_mtx);
 		list_for_each_entry(sta, &local->sta_list, list) {
 			set_sta_flag(sta, WLAN_STA_BLOCK_BA);
@@ -82,7 +82,7 @@
 		if (err < 0) {
 			local->quiescing = false;
 			local->wowlan = false;
-			if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
+			if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
 				mutex_lock(&local->sta_mtx);
 				list_for_each_entry(sta,
 						    &local->sta_list, list) {