[ARM] 4299/1: S3C AC97 fill in register bit defines

Create defines in the same styles as other s3c include files
giving names to bits in registers within the AC97 IO unit.

Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>