ARM: S3C64XX: Add AC97 platform resources

This patch defines the platform device and the resources: IRQ, DMA and MEM,
needed by the AC97 controller driver.

Signed-off-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>