ARM: S3C64XX: Ensure s3c64xx_ide_setup_gpio() is prototyped

Since it's exported we should make sure we're using the prototype
others see.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s3c64xx/setup-ide.c

@@ -17,6 +17,7 @@
 #include <mach/map.h>
 #include <mach/regs-clock.h>
 #include <plat/gpio-cfg.h>
+#include <plat/ata.h>
 
 void s3c64xx_ide_setup_gpio(void)
 {