Add gsm phone support for the mixer in tsc2101 alsa driver. This allows
selecting cellphone for the playback target via alsa mixer interface.
Selection will connect gsm module to speaker and microphone allowing the
user to speak to phone and listen the opponents voice. Tested in ipaq
h63xx by using gomunicator as an application. Tux wanna call home, and
now Tux can finally call home :-)
Signed-off-by: Mika Laitio <lamikr@cc.jyu.fi>
Signed-off-by: Tony Lindgren <tony@atomide.com>