[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-ep93xx/gpio.c b/arch/arm/mach-ep93xx/gpio.c
index 0f3fb87..5a06ed9 100644
--- a/arch/arm/mach-ep93xx/gpio.c
+++ b/arch/arm/mach-ep93xx/gpio.c
@@ -16,9 +16,9 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/seq_file.h>
+#include <linux/io.h>
 
 #include <mach/ep93xx-regs.h>
-#include <asm/io.h>
 #include <asm/gpio.h>
 
 struct ep93xx_gpio_chip {