use twl4030_voice_set_tristate() for tristating the TWL4030 voice PCM

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
removed duplicate #include

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
fixed misconfiguration where we do have our gta04 specific twl4030 audio driver and the generic one

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
fixed enabling/disabling voice interface for hw/sw routing

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>