ARM: SAMSUNG: cleanup mach/gpio-fns.h gpio-track.h and gpio-nrs.h

remove <mach/gpio-fns.h>, <mach/gpio-track.h> and <plat/gpio-fns.h>

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/mach-s3c24xx/mach-at2440evb.c b/arch/arm/mach-s3c24xx/mach-at2440evb.c
index 00381fe..f51bbcb 100644
--- a/arch/arm/mach-s3c24xx/mach-at2440evb.c
+++ b/arch/arm/mach-s3c24xx/mach-at2440evb.c
@@ -14,6 +14,7 @@
 
 #include <linux/kernel.h>
 #include <linux/types.h>
+#include <linux/gpio.h>
 #include <linux/interrupt.h>
 #include <linux/list.h>
 #include <linux/timer.h>