[ALSA] hda-intel - Fix compile warning in snd_hwdep_ioctl_compat()

Fix missing cast:
    sound/pci/hda/hda_hwdep.c:86: warning: passing argument 4 of 'hda_hwdep_ioctl' makes integer from pointer without a cast

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>