Bluetooth: Fix error value for wrong FCS.

Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Acked-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/l2cap.c

@@ -3423,7 +3423,7 @@ static int l2cap_check_fcs(struct l2cap_pinfo *pi,  struct sk_buff *skb)
 		our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size);
 
 		if (our_fcs != rcv_fcs)
-			return -EINVAL;
+			return -EBADMSG;
 	}
 	return 0;
 }