[alsa-devel] max channels of 3 jacks 6 channels motherboard using model=auto realtek codec

[Raymond Yau]

Refer to commit ce764ab22e40a046065c9417ee5f04ad2a816ac1

ALSA: hda - Add channel-mode support to Realtek auto-parser

It seem that max channel is six instead of two when the channel mode
is 2ch for those 3 jacks motherboard

using hda-emu and alsa-info from
http://thread.gmane.org/gmane.linux.alsa.devel/86816

> PCM 0 p 44100 2 16
Open PCM ALC887 Analog for play
Available PCM parameters:
  channels: 2/6
  formats: S16_LE S32_LE
  rates: 44100 48000 96000 192000
Prepare PCM, rate=44100, channels=2, format=16 bits


because

	spec->multiout.max_channels = spec->multiout.num_dacs * 2;

is assigned after  alc_auto_add_multi_channel_mode() increase
spec->multiout.num_dacs from 1 to 3

		spec->multiout.num_dacs = num_pins + 1;