misc: ep93xx_pwm: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d063
(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>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/ep93xx_pwm.c

@@ -347,7 +347,6 @@ static int __exit ep93xx_pwm_remove(struct platform_device *pdev)
 	ep93xx_pwm_disable(pwm);
 	clk_disable(pwm->clk);
 	clk_put(pwm->clk);
-	platform_set_drvdata(pdev, NULL);
 	sysfs_remove_group(&pdev->dev.kobj, &ep93xx_pwm_sysfs_files);
 	iounmap(pwm->mmio_base);
 	release_mem_region(res->start, resource_size(res));