HP mute led support output mute led and input mute led.
ALC280:
GPIO3 to control output mute led.
Mic1 vref to control input mute led.
ALC282:
Line1 vref to control output mute led.
Mic1 vref to control input mute led.
Signed-off-by: NKailang Yang <kailang@realtek.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>