Revert "mac80211: build compat on kernel 4.14"

It was fixed by upstream alreadly.

package/kernel/mac80211/patches/subsys/701-mac80211-build-on-linux_4_14.patch

@@ -1,30 +0,0 @@
-diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
-index bd5988e..df6bd18 100644
---- a/net/mac80211/rx.c
-+++ b/net/mac80211/rx.c
-@@ -4774,12 +4774,25 @@ void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
- 	rcu_read_unlock();
- 
- 	if (!napi) {
-+#if LINUX_VERSION_IS_GEQ(4,19,0)
- 		netif_receive_skb_list(&list);
-+#else
-+		list_for_each_entry_safe(skb, tmp, &list, list) {
-+			__list_del_entry(&skb->list);
-+			skb->next = NULL;
-+			netif_receive_skb(skb);
-+		}
-+#endif
- 		return;
- 	}
- 
- 	list_for_each_entry_safe(skb, tmp, &list, list) {
-+#if LINUX_VERSION_IS_GEQ(4,19,0)
- 		skb_list_del_init(skb);
-+#else
-+		__list_del_entry(&skb->list);
-+		skb->next = NULL;
-+#endif
- 		napi_gro_receive(napi, skb);
- 	}
- }