SPU: Check voice addresses on IRQ re-enable

NASCAR 2001 music depends on the IRQ firing multiple times, when the
voice address is still set to the IRQ address.

src/core/spu.h

@@ -335,6 +335,7 @@ private:
   void WriteVoiceRegister(u32 offset, u16 value);
 
   void CheckRAMIRQ(u32 address);
+  void CheckForLateRAMIRQs();
   void WriteToCaptureBuffer(u32 index, s16 value);
   void IncrementCaptureBufferPosition();