[ARM] Convert asm/io.h to linux/io.h

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/gpio.c b/arch/arm/mach-pxa/gpio.c
index 07acc1b..418d4df 100644
--- a/arch/arm/mach-pxa/gpio.c
+++ b/arch/arm/mach-pxa/gpio.c
@@ -16,10 +16,10 @@
 #include <linux/module.h>
 #include <linux/irq.h>
 #include <linux/sysdev.h>
+#include <linux/io.h>
 
 #include <asm/gpio.h>
 #include <mach/hardware.h>
-#include <asm/io.h>
 #include <mach/pxa-regs.h>
 #include <mach/pxa2xx-gpio.h>