mic: vop: Constify static structs

vop_vq_config_ops and id_table[] are never modified so make them const
to allow the compiler to put them in read-only memory.

Before:
   text    data     bss     dec     hex filename
  14889    4065     192   19146    4aca drivers/misc/mic/vop/vop_main.o

After:
   text    data     bss     dec     hex filename
  15113    3841     192   19146    4aca drivers/misc/mic/vop/vop_main.o
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20200610224704.27082-5-rikard.falkeborn@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mic/vop/vop_main.c

@@ -438,7 +438,7 @@ static int vop_find_vqs(struct virtio_device *dev, unsigned nvqs,
 /*
  * The config ops structure as defined by virtio config
  */
-static struct virtio_config_ops vop_vq_config_ops = {
+static const struct virtio_config_ops vop_vq_config_ops = {
 	.get_features = vop_get_features,
 	.finalize_features = vop_finalize_features,
 	.get = vop_get,
@@ -763,7 +763,7 @@ static void vop_driver_remove(struct vop_device *vpdev)
 	kfree(vi);
 }
 
-static struct vop_device_id id_table[] = {
+static const struct vop_device_id id_table[] = {
 	{ VOP_DEV_TRNSP, VOP_DEV_ANY_ID },
 	{ 0 },
 };