More configcheck fixes.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/mmzone.h b/include/asm-mips/mmzone.h
index d721143..011caeb 100644
--- a/include/asm-mips/mmzone.h
+++ b/include/asm-mips/mmzone.h
@@ -5,6 +5,7 @@
 #ifndef _ASM_MMZONE_H_
 #define _ASM_MMZONE_H_
 
+#include <linux/config.h>
 #include <asm/page.h>
 #include <mmzone.h>