MIPS: pic32: include linux/io.h header on several files

The pic32.h header includes linux/io.h, however nothing from that
include file is directly used by pic32.h. Several C files that
include pic32.h indirectly depend on linux/io.h, so let's go ahead
and add the missing include so that linux/io.h can be dropped from
pic32.h.

Signed-off-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/pic32/common/reset.c

@@ -4,6 +4,7 @@
  * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
  */
 #include <linux/init.h>
+#include <linux/io.h>
 #include <linux/pm.h>
 #include <asm/reboot.h>
 #include <asm/mach-pic32/pic32.h>

arch/mips/pic32/pic32mzda/early_clk.c

@@ -3,6 +3,7 @@
  * Joshua Henderson <joshua.henderson@microchip.com>
  * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
  */
+#include <linux/io.h>
 #include <asm/mach-pic32/pic32.h>
 
 #include "pic32mzda.h"

arch/mips/pic32/pic32mzda/early_console.c

@@ -3,6 +3,7 @@
  * Joshua Henderson <joshua.henderson@microchip.com>
  * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
  */
+#include <linux/io.h>
 #include <asm/mach-pic32/pic32.h>
 #include <asm/fw/fw.h>
 #include <asm/setup.h>