[ARM] S3C24A0: Correct S3C2410_PA_GPIO in S3C24XX_VA_GPIO

The definition of S3C24XX_VA_GPIO used S3C2410_PA_GPIO
where it should have read S3C24XX_PA_GPIO.

Signed-off-by: Sandeep Patil <sandeep.patil@azingo.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>