Bluetooth: L2CAP: Don't return -EAGAIN if out of credits

Just keep queueing them into TX queue since the caller might just have
to do the same and there is no impact in adding another packet to the
TX queue even if there aren't any credits to transmit them.
Signed-off-by: NLuiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: NJukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

net/bluetooth/l2cap_core.c

@@ -2458,9 +2458,6 @@ int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len)
 		if (len > chan->omtu)
 			return -EMSGSIZE;
 
-		if (!chan->tx_credits)
-			return -EAGAIN;
-
 		__skb_queue_head_init(&seg_queue);
 
 		err = l2cap_segment_le_sdu(chan, &seg_queue, msg, len);