driver core: constify devlink class

The devlink class object is never modified and can be made constant.

Signed-off-by: Bartosz Golaszewski <[e-mail]>
Acked-by: Rafael J. Wysocki <[e-mail]>
Acked-by: Saravana Kannan <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/base/core.c

···
 }
 EXPORT_SYMBOL_GPL(device_link_wait_removal);
 
-static struct class devlink_class = {
+static const struct class devlink_class = {
 	.name = "devlink",
 	.dev_groups = devlink_groups,
 	.dev_release = devlink_dev_release,