[ARM] S3C24XX: GPIO: Clean out unused definitions in <mach/regs-gpio.h>

The <mach/regs-gpio.h> really does not need the input and output
pin configurations as these are standard and have a generic
representation (plus the s3c24xx gpio specific code is going to
be phased out soon).

The following sed was applied to remove the lines:

    sed -i~ -e '/S3C2410_GP[A-Z][0-9]*_\INP/d' \
	    -e '/S3C2410_GP[A-Z][0-9]*_\OUTP/d' \
	    -e '/S3C2410_GPA[0-9]*_OUT/d'

to remove these.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>