Bluetooth: Fix setting of MTU for ERTM and Streaming Mode

The desired MTU should be sent in an Config_Req for all modes.
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

net/bluetooth/l2cap.c

@@ -2569,11 +2569,11 @@ static int l2cap_build_conf_req(struct sock *sk, void *data)
 	}
 
 done:
-	switch (pi->mode) {
-	case L2CAP_MODE_BASIC:
 	if (pi->imtu != L2CAP_DEFAULT_MTU)
 		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu);
 
+	switch (pi->mode) {
+	case L2CAP_MODE_BASIC:
 		if (!(pi->conn->feat_mask & L2CAP_FEAT_ERTM) &&
 				!(pi->conn->feat_mask & L2CAP_FEAT_STREAMING))
 			break;