[ARM] S3C24XX: GPIO: Change to macros for GPIO numbering

Prepare to remove the large number of S3C2410_GPxn defines
by moving to S3C2410_GPx(n) in arch/arm.

The following perl was used to change the files:

    perl -pi~ -e 's/S3C2410_GP([A-Z])([0-9]+)([^_^0-9])/S3C2410_GP\1\(\2\)\3/g'

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/mach-s3c2410/gpio.c b/arch/arm/mach-s3c2410/gpio.c
index 36a3132..bf7fbfe 100644
--- a/arch/arm/mach-s3c2410/gpio.c
+++ b/arch/arm/mach-s3c2410/gpio.c
@@ -39,12 +39,12 @@
 	unsigned long flags;
 	unsigned long val;
 
-	if (pin < S3C2410_GPG8 || pin > S3C2410_GPG15)
+	if (pin < S3C2410_GPG(8) || pin > S3C2410_GPG(15))
 		return -1;
 
 	config &= 0xff;
 
-	pin -= S3C2410_GPG8;
+	pin -= S3C2410_GPG(8);
 	reg += pin & ~3;
 
 	local_irq_save(flags);