bcm2835-mmc: Deduplicate reset of driver data on remove

The BCM2835 MMC host driver sets the device's driver data pointer to
NULL on ->remove() even though the driver core subsequently does the
same in __device_release_driver().  Drop the duplicate assignment.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: Frank Pavlic <f.pavlic@kunbus.de>

drivers/mmc/host/bcm2835-mmc.c

@@ -1561,7 +1561,6 @@ static int bcm2835_mmc_remove(struct platform_device *pdev)
 		dma_release_channel(host->dma_chan_rxtx);
 
 	mmc_free_host(host->mmc);
-	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }