[ALSA] hda-intel - Remove volatile

Removed volatile from the position buffer pointer.
Also, use synchronize_irq() instead of unreliable msleep(1)
in the driver remove callback.

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