linux/types.h: add typedef of uintptr_t

Add this typedef in the same place as in Linux.  This is necessary
to refactor libfdt inclusion.

U-Boot also defines it in include/compiler.h.  Of course it should
not do that, but I do not want to open a can of worms.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/include/linux/types.h b/include/linux/types.h
index 416fa66..7c33e7a 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -24,6 +24,8 @@
 typedef __kernel_uid16_t        uid16_t;
 typedef __kernel_gid16_t        gid16_t;
 
+typedef unsigned long		uintptr_t;
+
 #ifdef CONFIG_UID16
 /* This is defined by include/asm-{arch}/posix_types.h */
 typedef __kernel_old_uid_t	old_uid_t;