[ALSA] ASoC S3C24xx machine drivers - Kconfig

This patch adds Kconfig and build support for the Neo1973, SMDK2443 and
S3C2443 AC97 ALSA audio drivers.

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>