Bluetooth: Fix missing cmd_status in mgmt

set_service_cache() was missing a cmd_status for the error case.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 080cfb6..9ffd7c3 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -897,6 +897,9 @@
 	if (err == 0)
 		err = cmd_complete(sk, index, MGMT_OP_SET_SERVICE_CACHE, NULL,
 									0);
+	else
+		cmd_status(sk, index, MGMT_OP_SET_SERVICE_CACHE, -err);
+
 
 	hci_dev_unlock_bh(hdev);
 	hci_dev_put(hdev);