ALSA: hda - VIA: Add new power management function.

Use set_widgets_power_state() function to seperately control different
codecs' power management actions and to replace the original large
function. Also fix some wrong widgets power up sequence which caused
no sound issue under Smart5.1 mode and Independent HP mode.

Signed-off-by: Lydia Wang <lydiawang@viatech.com.cn>
Signed-off-by: Takashi Iwai <tiwai@suse.de>