Makefile: fix "error: version_autogenerated.h: No such file or directory"

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/version.h b/include/version.h
index b56d2e9..a34291a 100644
--- a/include/version.h
+++ b/include/version.h
@@ -24,6 +24,8 @@
 #ifndef	__VERSION_H__
 #define	__VERSION_H__
 
+#ifndef DO_DEPS_ONLY
 #include "version_autogenerated.h"
+#endif
 
 #endif	/* __VERSION_H__ */