[U-Boot] include: fix mips64 build warning

[Zhi-zhou Zhang]

fix warnings when building mips64, we define CONFIG_MIPS64 in config file. And this macro decides size_t.
hashtable.c: In function 'hexport_r':
hashtable.c:495:2: warning: format '%zu' expects argument of type 'size_t', but argument 5 has type 'unsigned int' [-Wformat]
hashtable.c:554:5: warning: format '%zu' expects argument of type 'size_t', but argument 2 has type 'unsigned int' [-Wformat]
hashtable.c:554:5: warning: format '%zu' expects argument of type 'size_t', but argument 3 has type 'unsigned int' [-Wformat]
hashtable.c: In function 'himport_r':
hashtable.c:654:3: warning: format '%zu' expects argument of type 'size_t', but argument 2 has type 'unsigned int' [-Wformat]

Signed-off-by: Zhi-zhou Zhang <etou.zh at gmail.com>
---
 include/linux/types.h |    1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/types.h b/include/linux/types.h
index 1b0b4a4..33ee095 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -4,6 +4,7 @@
 #ifdef	__KERNEL__
 #include <linux/config.h>
 #endif
+#include <config.h>
 
 #include <linux/posix_types.h>
 #include <asm/types.h>
-- 
1.7.9.5