drm/radeon/kms: set fbdev_info for suspend/resume

this hopefully will bring back suspend/resume under kms.
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_fb.c

@@ -258,6 +258,7 @@ int radeonfb_create(struct drm_device *dev,
 		goto out_unref;
 	}
 
+	rdev->fbdev_info = info;
 	rfbdev = info->par;
 	rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 	rfbdev->helper.dev = dev;