md: open code md_probe in autorun_devices

autorun_devices should not be limited to the controls for the legacy
probe on open, so just call md_alloc directly.

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Reviewed-and-tested-by: Logan Gunthorpe <[e-mail]>
Signed-off-by: Song Liu <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/md/md.c

···
 			break;
 		}
 
-		md_probe(dev);
+		md_alloc(dev, NULL);
 		mddev = mddev_find(dev);
 		if (!mddev)
 			break;