spi: jcore: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.
Signed-off-by: NWei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi-jcore.c

@@ -206,7 +206,6 @@ static int jcore_spi_probe(struct platform_device *pdev)
 exit_busy:
 	err = -EBUSY;
 exit:
-	platform_set_drvdata(pdev, NULL);
 	spi_master_put(master);
 	return err;
 }