ARM: SAMSUNG: Remove empty gpio-core.h and use central plat/gpio-core.h

Rename mach-s3c2410/include/mach/gpio-core.h to mach/gpio-track.h so that
it can be included by <plat/gpio-core.h> when needed.

Eliminate all other empty gpio-core.h files and just include the
<plat/gpio-core.h> as necessary.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-s5pc1xx/gpiolib.c b/arch/arm/plat-s5pc1xx/gpiolib.c
index facb410..1ffc57a 100644
--- a/arch/arm/plat-s5pc1xx/gpiolib.c
+++ b/arch/arm/plat-s5pc1xx/gpiolib.c
@@ -17,8 +17,8 @@
 #include <linux/gpio.h>
 
 #include <mach/map.h>
-#include <mach/gpio-core.h>
 
+#include <plat/gpio-core.h>
 #include <plat/gpio-cfg.h>
 #include <plat/gpio-cfg-helpers.h>
 #include <plat/regs-gpio.h>