fsi: master: Constify hub_master_ids

The only usage of hub_master_ids is to assign its address to the
id_table field in the fsi_driver struct, which is a const pointer, so
make it const to allow the compiler to put it in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>

drivers/fsi/fsi-master-hub.c

@@ -276,7 +276,7 @@ static int hub_master_remove(struct device *dev)
 	return 0;
 }
 
-static struct fsi_device_id hub_master_ids[] = {
+static const struct fsi_device_id hub_master_ids[] = {
 	{
 		.engine_type = FSI_ENGID_HUB_MASTER,
 		.version = FSI_VERSION_ANY,