ARM: imx: include board headers in the same folder

The headers that are only used by board files do not necessarily
need to be in plat-mxc/include/mach.  Move them to the same place
as those board files.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-imx/mach-mx31lite.c

@@ -41,10 +41,10 @@
 
 #include <mach/hardware.h>
 #include <mach/common.h>
-#include <mach/board-mx31lite.h>
 #include <mach/iomux-mx3.h>
 #include <mach/ulpi.h>
 
+#include "board-mx31lite.h"
 #include "devices-imx31.h"
 
 /*