arm/mach-sa1100/simpad.c: Remove duplicate header

Remove linux/gpio/machine.h which is included more than once.
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-sa1100/simpad.c

@@ -18,7 +18,6 @@
 #include <linux/mtd/partitions.h>
 #include <linux/io.h>
 #include <linux/gpio/driver.h>
-#include <linux/gpio/machine.h>
 
 #include <mach/hardware.h>
 #include <asm/setup.h>