Add more services and some fixes, along with more "override"

in the service's headers

src/core/hle/service/dsp_dsp.h

@@ -19,7 +19,7 @@ public:
      * Gets the string port name used by CTROS for the service
      * @return Port name of service
      */
-    std::string GetPortName() const {
+    std::string GetPortName() const override {
         return "dsp:DSP";
     }
 };