drm/radeon: switch to using late_initcall

This fixes an issue where we get inited before fbcon when built-in.

Ideally this should work as a non late_initcall, but this fixes it for now.
We also don't suggest people build this in (at least distro maintainers).

Reported-by: Ryan Hope <rmh3093@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_drv.c

@@ -345,7 +345,7 @@ static void __exit radeon_exit(void)
 	drm_exit(driver);
 }
 
-module_init(radeon_init);
+late_initcall(radeon_init);
 module_exit(radeon_exit);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);