stratosphere-except-ldr: use fs bindings (this temporarily breaks loader)

stratosphere/dmnt/source/dmnt_main.cpp

@@ -78,14 +78,13 @@ void __appInit(void) {
         R_ABORT_UNLESS(fsInitialize());
     });
 
-    R_ABORT_UNLESS(fsdevMountSdmc());
+    R_ABORT_UNLESS(fs::MountSdCard("sdmc"));
 
     ams::CheckApiVersion();
 }
 
 void __appExit(void) {
     /* Cleanup services. */
-    fsdevUnmountAll();
     fsExit();
     hidExit();
     setsysExit();