[ALSA] ASoC S3C24xx machine drivers - Openmoko Neo1973

This patch adds ALSA support for the Openmoko Neo1973 phone. Features:-
 * HiFi Playback and capture.
 * Phone calls supported.
 * Support for BT PCM in WM8753 voice interface.
 * Support for LM4857 audio amp.

Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>