Bluetooth: Rename L2CAP_LE_DEFAULT_MTU

This patch renames L2CAP_LE_DEFAULT_MTU macro to L2CAP_LE_MIN_MTU
since it represents the minimum MTU value, not the default MTU
value for LE.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index ab5868d..a4bb27e 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -449,7 +449,7 @@
 {
 	switch (chan->scid) {
 	case L2CAP_CID_LE_DATA:
-		if (mtu < L2CAP_LE_DEFAULT_MTU)
+		if (mtu < L2CAP_LE_MIN_MTU)
 			return false;
 		break;