ARM: S3C64XX: Fix dev-audio build

As reported when the patch was posted commit 71269364

 ("ARM: S3C64XX:
Add I2S resources in platform code") uses pin names for the IISv4
data output pins which are not present in mainline, causing dev-audio
to fail to build. Fix this by using the defines which are actually
present in the kernel source.

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