arm: Add explicit include of <asm/mach-types.h>

Rather than relying on common.h to provide this include, which is going
away at some point, include it explicitly in each file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/spear/x600/x600.c b/board/spear/x600/x600.c
index f8e9fdd..2c34ea1 100644
--- a/board/spear/x600/x600.c
+++ b/board/spear/x600/x600.c
@@ -14,6 +14,7 @@
 #include <phy.h>
 #include <rtc.h>
 #include <asm/io.h>
+#include <asm/mach-types.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/spr_defs.h>
 #include <asm/arch/spr_misc.h>