ddsf: implement namespace

libraries/libstratosphere/include/stratosphere.hpp

@@ -43,6 +43,7 @@
 #include <stratosphere/boot2.hpp>
 #include <stratosphere/capsrv.hpp>
 #include <stratosphere/cfg.hpp>
+#include <stratosphere/ddsf.hpp>
 #include <stratosphere/dmnt.hpp>
 #include <stratosphere/erpt.hpp>
 #include <stratosphere/err.hpp>