mtd: maps: sa1100-flash: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d
(device-core: Ensure drvdata = NULL when no driver is bound).
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: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/maps/sa1100-flash.c

@@ -279,7 +279,6 @@ static int __exit sa1100_mtd_remove(struct platform_device *pdev)
 	struct sa_info *info = platform_get_drvdata(pdev);
 	struct flash_platform_data *plat = pdev->dev.platform_data;
 
-	platform_set_drvdata(pdev, NULL);
 	sa1100_destroy(info, plat);
 
 	return 0;