Input: pxa27x_keypad - remove unnecessary ARM includes

Remove some left-over ARM only includes in order to enable building on
ARM64. __raw_{read,write}l were getting implicitly included, so add
linux/io.h include.
Signed-off-by: NRob Herring <robh@kernel.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/pxa27x_keypad.c

@@ -20,6 +20,7 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/input.h>
+#include <linux/io.h>
 #include <linux/device.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
@@ -28,10 +29,6 @@
 #include <linux/slab.h>
 #include <linux/of.h>
 
-#include <asm/mach/arch.h>
-#include <asm/mach/map.h>
-
-#include <mach/hardware.h>
 #include <linux/platform_data/keypad-pxa27x.h>
 /*
  * Keypad Controller registers