[DSP] Stubbing events (vol 1)

include/kernel/kernel.hpp

@@ -191,4 +191,5 @@ public:
 	}
 
 	void sendGPUInterrupt(GPUInterrupt type) { serviceManager.requestGPUInterrupt(type); }
+	void signalDSPEvents() { serviceManager.signalDSPEvents(); }
 };

include/services/dsp.hpp

@@ -93,4 +93,6 @@ public:
 		Stereo = 1,
 		Surround = 2
 	};
+
+	void signalEvents();
 };

include/services/service_manager.hpp

@@ -80,4 +80,6 @@ public:
 	void requestGPUInterrupt(GPUInterrupt type) { gsp_gpu.requestInterrupt(type); }
 	void setGSPSharedMem(u8* ptr) { gsp_gpu.setSharedMem(ptr); }
 	void setHIDSharedMem(u8* ptr) { hid.setSharedMem(ptr); }
+
+	void signalDSPEvents() { dsp.signalEvents(); }
 };