[ALSA] intel8x0m - Free irq in suspend

Free the irq handler in suspend and reacquire in resume as well as
intel8x0 audio driver does.  Some devices may change the irq line
dynamically during suspend/resume.

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