net: ieee802154: remove unnecessary spi_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: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ieee802154/at86rf230.c

@@ -987,7 +987,6 @@ static int at86rf230_probe(struct spi_device *spi)
 err_slp_tr:
 	gpio_free(lp->rstn);
 err_rstn:
-	spi_set_drvdata(spi, NULL);
 	mutex_destroy(&lp->bmux);
 	ieee802154_free_device(lp->dev);
 	return rc;
@@ -1006,7 +1005,6 @@ static int at86rf230_remove(struct spi_device *spi)
 		gpio_free(lp->slp_tr);
 	gpio_free(lp->rstn);
 
-	spi_set_drvdata(spi, NULL);
 	mutex_destroy(&lp->bmux);
 	ieee802154_free_device(lp->dev);
 

drivers/net/ieee802154/mrf24j40.c

@@ -715,7 +715,6 @@ static int mrf24j40_remove(struct spi_device *spi)
 	 * complete? */
 
 	/* Clean up the SPI stuff. */
-	spi_set_drvdata(spi, NULL);
 	kfree(devrec->buf);
 	kfree(devrec);
 	return 0;