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-davinci/gpio.c b/arch/arm/mach-davinci/gpio.c
index cafbe13..a8066e8 100644
--- a/arch/arm/mach-davinci/gpio.c
+++ b/arch/arm/mach-davinci/gpio.c
@@ -9,15 +9,13 @@
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  */
-
+#include <linux/gpio.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/io.h>
 
-#include <mach/gpio.h>
-
 #include <asm/mach/irq.h>
 
 struct davinci_gpio_regs {