wireless: use OR operation to set wiphy features

The next patch will introduce a flag that is set
by default in cfg80211 so drivers and mac80211
need to use |= to set features they have so that
they don't clear the already-set feature.

We could set the flag in wiphy_register() instead
of wiphy_new() to avoid this patch, but then the
drivers couldn't *unset* flags they don't want to
use even though the implementation is generic.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 620f427..931f14f 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -598,9 +598,9 @@
 	if (ops->remain_on_channel)
 		wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 
-	wiphy->features = NL80211_FEATURE_SK_TX_STATUS |
-			  NL80211_FEATURE_SAE |
-			  NL80211_FEATURE_HT_IBSS;
+	wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
+			   NL80211_FEATURE_SAE |
+			   NL80211_FEATURE_HT_IBSS;
 
 	if (!ops->set_key)
 		wiphy->flags |= WIPHY_FLAG_IBSS_RSN;