spi: spidev: 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 <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/spi/spidev.c

···
 	/* make sure ops on existing fds can abort cleanly */
 	spin_lock_irq(&spidev->spi_lock);
 	spidev->spi = NULL;
-	spi_set_drvdata(spi, NULL);
 	spin_unlock_irq(&spidev->spi_lock);
 
 	/* prevent new opens */