mac802154: don't warn on unsupported frames

Just because we don't support certain types of frames yet doesn't mean
we have to flood the message log with warnings about "invalid" frames.

Signed-off-by: Aristeu Rozanski <[e-mail]>
Acked-by: Alexander Aring <[e-mail]>
Signed-off-by: Marcel Holtmann <[e-mail]>

net/mac802154/rx.c

···
 	sdata->dev->stats.rx_bytes += skb->len;
 
 	switch (mac_cb(skb)->type) {
+	case IEEE802154_FC_TYPE_BEACON:
+	case IEEE802154_FC_TYPE_ACK:
+	case IEEE802154_FC_TYPE_MAC_CMD:
+		goto fail;
+
 	case IEEE802154_FC_TYPE_DATA:
 		return ieee802154_deliver_skb(skb);
 	default: