The s3c2410_gpio* calls are obsolete and have been scheduled for
removal since several kernel releases. Remove them and use common
gpiolib API.
This patch is a prerequisite for removal of the obsolete S3C24XX
SoC GPIO definitions.

Tested on Micro2440-SDK.

Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: NSylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>