soc: fsl: dpio: Suppress duplicated error reporting on device remove

Returning an error code from a fsl_mc_driver's remove callback results
in a generic error message, otherwise the value is ignored and the device
gets unbound.

As the only error path in dpaa2_dpio_remove() already emits an error
message, return zero unconditionally to suppress another (less helpful)
error report.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com> # sanity checks
Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Tested-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

Author: Uwe Kleine-König

drivers/soc/fsl/dpio/dpio-driver.c

@@ -297,14 +297,10 @@ static int dpaa2_dpio_remove(struct fsl_mc_device *dpio_dev)
 
 	dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle);
 
-	fsl_mc_portal_free(dpio_dev->mc_io);
-
-	return 0;
-
 err_open:
 	fsl_mc_portal_free(dpio_dev->mc_io);
 
-	return err;
+	return 0;
 }
 
 static const struct fsl_mc_device_id dpaa2_dpio_match_id_table[] = {