[ALSA] soc - Support PXA3xx AC97

The PXA3xx does not support the use of interrupts during reset and access
to the GPIO status requires similar handling to that for PXA27x.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>