wireless: use __aligned

Use __aligned(...) instead of __attribute__((aligned(...)))
in mac80211 and cfg80211.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/core.h b/net/wireless/core.h
index b8f4630..f342267 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -89,7 +89,7 @@
 
 	/* must be last because of the way we do wiphy_priv(),
 	 * and it should at least be aligned to NETDEV_ALIGN */
-	struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
+	struct wiphy wiphy __aligned(NETDEV_ALIGN);
 };
 
 static inline