ALSA: hda/sigmatel: Keep power up while beep is enabled

It seems that the beep playback doesn't work well on IDT codec devices
when the codec auto-pm is enabled.  Keep the power on while the beep
switch is enabled.

Link: https://bugzilla.suse.com/show_bug.cgi?id=1200544
Link: https://lore.kernel.org/r/20220904072750.26164-1-tiwai@suse.de


Signed-off-by: Takashi Iwai <tiwai@suse.de>