service/nvdrv: Silence -Wswitch

src/core/hle/service/nvdrv/devices/nvhost_as_gpu.cpp

@@ -45,6 +45,8 @@ u32 nvhost_as_gpu::ioctl(Ioctl command, const std::vector<u8>& input, const std:
         return GetVARegions(input, output);
     case IoctlCommand::IocUnmapBufferCommand:
         return UnmapBuffer(input, output);
+    default:
+        break;
     }
 
     if (static_cast<IoctlCommand>(command.cmd.Value()) == IoctlCommand::IocRemapCommand)

src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp

@@ -38,9 +38,10 @@ u32 nvhost_ctrl::ioctl(Ioctl command, const std::vector<u8>& input, const std::v
         return IocCtrlEventUnregister(input, output);
     case IoctlCommand::IocCtrlEventSignalCommand:
         return IocCtrlEventSignal(input, output);
-    }
+    default:
         UNIMPLEMENTED_MSG("Unimplemented ioctl");
         return 0;
+    }
 }
 
 u32 nvhost_ctrl::NvOsGetConfigU32(const std::vector<u8>& input, std::vector<u8>& output) {

src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.cpp

@@ -40,9 +40,10 @@ u32 nvhost_ctrl_gpu::ioctl(Ioctl command, const std::vector<u8>& input,
         return FlushL2(input, output);
     case IoctlCommand::IocGetGpuTime:
         return GetGpuTime(input, output);
-    }
+    default:
         UNIMPLEMENTED_MSG("Unimplemented ioctl");
         return 0;
+    }
 }
 
 u32 nvhost_ctrl_gpu::GetCharacteristics(const std::vector<u8>& input, std::vector<u8>& output,

src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp

@@ -44,6 +44,8 @@ u32 nvhost_gpu::ioctl(Ioctl command, const std::vector<u8>& input, const std::ve
         return GetWaitbase(input, output);
     case IoctlCommand::IocChannelSetTimeoutCommand:
         return ChannelSetTimeout(input, output);
+    default:
+        break;
     }
 
     if (command.group == NVGPU_IOCTL_MAGIC) {