[ALSA] ASoC pxa2xx Corgi machine support

This patch adds Alsa audio support to the Sharp Zaurus SL-C7x0/C860
(Corgi) machines.
From: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Graeme Gregory <dp@xora.org.uk>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>