include: Add <linux/types.h> in a few places

These files references a number of types that are defined in
<linux/types.h> (and so forth), so include it here rather than rely on
indirect inclusion.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/bootstage.h

@@ -11,6 +11,7 @@
 #ifndef _BOOTSTAGE_H
 #define _BOOTSTAGE_H
 
+#include <linux/types.h>
 #include <linux/kconfig.h>
 
 /* Flags for each bootstage record */

include/cache.h

@@ -6,6 +6,8 @@
 #ifndef __CACHE_H
 #define __CACHE_H
 
+#include <linux/types.h>
+
 struct udevice;
 
 /*

include/cpu.h

@@ -7,6 +7,8 @@
 #ifndef __CPU_H
 #define __CPU_H
 
+#include <linux/types.h>
+
 struct udevice;
 
 /**