The mute LED is in this case connected to the Mic1 VREF.
The machine also exposes the following string in BIOS:
"HP_Mute_LED_0_A", so if more machines are coming, it probably
makes sense to try to do something more generic, like for the
IDT codec.
Cc: [email protected]
BugLink: https://bugs.launchpad.net/bugs/1096789
Signed-off-by: David Henningsson <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>