[ARM] lh7a40x: avoid polluting the kernel's namespace

Avoid unnecessarily pollution of the kernel's namespace by avoiding
mach/hardware.h in mach/io.h.  Include this header file where necessary.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-lh7a40x/include/mach/io.h b/arch/arm/mach-lh7a40x/include/mach/io.h
index 031d26f..e41422d 100644
--- a/arch/arm/mach-lh7a40x/include/mach/io.h
+++ b/arch/arm/mach-lh7a40x/include/mach/io.h
@@ -11,8 +11,6 @@
 #ifndef __ASM_ARCH_IO_H
 #define __ASM_ARCH_IO_H
 
-#include <mach/hardware.h>
-
 #define IO_SPACE_LIMIT 0xffffffff
 
 /* No ISA or PCI bus on this machine. */
diff --git a/drivers/serial/serial_lh7a40x.c b/drivers/serial/serial_lh7a40x.c
index 61dc8b3..a7bf024 100644
--- a/drivers/serial/serial_lh7a40x.c
+++ b/drivers/serial/serial_lh7a40x.c
@@ -41,9 +41,10 @@
 #include <linux/tty_flip.h>
 #include <linux/serial_core.h>
 #include <linux/serial.h>
+#include <linux/io.h>
 
-#include <asm/io.h>
 #include <asm/irq.h>
+#include <mach/hardware.h>
 
 #define DEV_MAJOR	204
 #define DEV_MINOR	16