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/plat-pxa/gpio.c b/arch/arm/plat-pxa/gpio.c
index a11dc36..5d6a86b 100644
--- a/arch/arm/plat-pxa/gpio.c
+++ b/arch/arm/plat-pxa/gpio.c
@@ -11,15 +11,13 @@
  *  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/irq.h>
 #include <linux/io.h>
 #include <linux/syscore_ops.h>
 #include <linux/slab.h>
 
-#include <mach/gpio.h>
-
 int pxa_last_gpio;
 
 struct pxa_gpio_chip {