ALSA: pcsp: Remove redundant platform_set_drvdata()

Commit 0998d06310 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Stas Sergeev <stsp@users.sourceforge.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/drivers/pcsp/pcsp.c

@@ -189,7 +189,6 @@ static int pcsp_remove(struct platform_device *dev)
 	struct snd_pcsp *chip = platform_get_drvdata(dev);
 	alsa_card_pcsp_exit(chip);
 	pcspkr_input_remove(chip->input_dev);
-	platform_set_drvdata(dev, NULL);
 	return 0;
 }