spi: mxs: Assign message status after transfer finished

In the current code implementing the MXS SPI driver, every transferred
message had assigned status = 0, which is not correct. Properly assign
status returned from the I/O functions.
Signed-off-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

drivers/spi/spi-mxs.c

@@ -480,7 +480,7 @@ static int mxs_spi_transfer_one(struct spi_master *master,
 		first = last = 0;
 	}
 
-	m->status = 0;
+	m->status = status;
 	spi_finalize_current_message(master);
 
 	return status;