Only reset drive chip state (not DI registers) when changing discs

Resetting the DI registers disables interrupts, which means any errors reported (for instance) are just not sent though.

Source/Core/Core/HW/DVD/DVDInterface.cpp

@@ -375,6 +375,13 @@ void Reset(bool spinup)
   s_DICFG.Hex = 0;
   s_DICFG.CONFIG = 1;  // Disable bootrom descrambler
 
+  ResetDrive(spinup);
+}
+
+// Resets state on the MN102 chip in the drive itself, but not the DI registers exposed on the
+// emulated device, or any inserted disc.
+void ResetDrive(bool spinup)
+{
   s_stream = false;
   s_stop_at_track_end = false;
   s_audio_position = 0;
@@ -453,7 +460,7 @@ void SetDisc(std::unique_ptr<DiscIO::VolumeDisc> disc,
   DVDThread::SetDisc(std::move(disc));
   SetLidOpen();
 
-  Reset(false);
+  ResetDrive(false);
 }
 
 bool IsDiscInside()

Source/Core/Core/HW/DVD/DVDInterface.h

@@ -111,6 +111,7 @@ enum class EjectCause
 
 void Init();
 void Reset(bool spinup = true);
+void ResetDrive(bool spinup);
 void Shutdown();
 void DoState(PointerWrap& p);
 

Source/Core/Core/IOS/DI/DI.cpp

@@ -268,7 +268,7 @@ std::optional<DI::DIResult> DI::StartIOCtl(const IOCtlRequest& request)
   {
     const bool spinup = Memory::Read_U32(request.address + 4);
     INFO_LOG(IOS_DI, "DVDLowReset %s spinup", spinup ? "with" : "without");
-    DVDInterface::Reset(spinup);
+    DVDInterface::ResetDrive(spinup);
     ResetDIRegisters();
     return DIResult::Success;
   }

Source/Core/Core/IOS/MIOS.cpp

@@ -37,7 +37,7 @@ static void ReinitHardware()
   // HACK However, resetting DI will reset the DTK config, which is set by the system menu
   // (and not by MIOS), causing games that use DTK to break.  Perhaps MIOS doesn't actually
   // reset DI fully, in such a way that the DTK config isn't cleared?
-  // DVDInterface::Reset();
+  // DVDInterface::ResetDrive(true);
   PowerPC::Reset();
   Wiimote::ResetAllWiimotes();
   // Note: this is specific to Dolphin and is required because we initialised it in Wii mode.