ARM: UniPhier: replace <asm/io.h> with <linux/io.h>

In the Linux coding style, it is recommended to include <linux/io.h>
rather than <asm/io.h>.  Follow this trend.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/include/mach/led.h b/arch/arm/mach-uniphier/include/mach/led.h
index 21277da..f7749b4 100644
--- a/arch/arm/mach-uniphier/include/mach/led.h
+++ b/arch/arm/mach-uniphier/include/mach/led.h
@@ -1,6 +1,5 @@
 /*
- * Copyright (C) 2012-2014 Panasonic Corporation
- *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
+ * Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
@@ -77,7 +76,7 @@
 
 #else /* __ASSEMBLY__ */
 
-#include <asm/io.h>
+#include <linux/io.h>
 
 #define led_write(C0, C1, C2, C3)		\
 do {						\