ARM: gpio: convert includes of mach/gpio.h and asm/gpio.h to linux/gpio.h

Convert arch/arm includes of mach/gpio.h and asm/gpio.h to linux/gpio.h
before we start consolidating the individual platform implementations
of the gpio header files.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-sa1100/gpio.c b/arch/arm/mach-sa1100/gpio.c
index 0d3829a..e547ed4 100644
--- a/arch/arm/mach-sa1100/gpio.c
+++ b/arch/arm/mach-sa1100/gpio.c
@@ -7,11 +7,10 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-
+#include <linux/gpio.h>
 #include <linux/init.h>
 #include <linux/module.h>
 
-#include <asm/gpio.h>
 #include <mach/hardware.h>
 #include "generic.h"