bus: fsl-mc: properly empty-initialize structure

Use the proper form of the empty initializer when working with
structures that contain an array. Otherwise, older gcc versions (eg gcc
4.9) will complain about this.

Fixes: 1ac210d128ef ("bus: fsl-mc: add the fsl_mc_get_endpoint function")
Reported-by: kbuild test robot <[e-mail]>
Signed-off-by: Ioana Ciornei <[e-mail]>
Acked-by: Laurentiu Tudor <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/bus/fsl-mc/fsl-mc-bus.c

···
 struct fsl_mc_device *fsl_mc_get_endpoint(struct fsl_mc_device *mc_dev)
 {
 	struct fsl_mc_device *mc_bus_dev, *endpoint;
-	struct fsl_mc_obj_desc endpoint_desc = { 0 };
-	struct dprc_endpoint endpoint1 = { 0 };
-	struct dprc_endpoint endpoint2 = { 0 };
+	struct fsl_mc_obj_desc endpoint_desc = {{ 0 }};
+	struct dprc_endpoint endpoint1 = {{ 0 }};
+	struct dprc_endpoint endpoint2 = {{ 0 }};
 	int state, err;
 
 	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);