scsi: return ENODEV in scsi_get_blk_by_uuid()

Change scsi_get_blk_by_uuid() to return -ENODEV instead of -1 on error.
Other scsi_* functions return an error code rather than -1.

1 is EPERM, which doesn't make sense here. So we use ENODEV instead. The
only caller only checks for !success, so changing the value has no
effect on the caller.

Signed-off-by: David Lechner <dlechner@baylibre.com>

drivers/scsi/scsi-uclass.c

@@ -50,7 +50,7 @@ int scsi_get_blk_by_uuid(const char *uuid,
 		}
 	}
 
-	return -1;
+	return -ENODEV;
 }
 
 int scsi_bus_reset(struct udevice *dev)