- IPC service for handling ReverseNX-RT communication, reducing I/O requests

- Set config for "Auto CPU Boost"/"Sync ReverseNX Mode" in overlay

- Apply hardened freq cap to handheld mode (CPU@1963MHz, GPU@921MHz)

Source/sys-clk-OC/sysmodule/src/ipc_service.cpp

@@ -153,6 +153,13 @@ Result IpcService::ServiceHandlerFunc(void* arg, const IpcServerRequest* r, u8*
                 return ipcSrv->SetConfigValues((SysClkConfigValueList*)r->data.ptr);
             }
             break;
+
+        case SysClkIpcCmd_SetReverseNXRTMode:
+            if (r->data.size >= sizeof(ReverseNXMode)) {
+                ReverseNXMode mode = *((ReverseNXMode*)r->data.ptr);
+                return ipcSrv->SetReverseNXRTMode(mode);
+            }
+            break;
     }
 
     return SYSCLK_ERROR(Generic);
@@ -288,4 +295,10 @@ Result IpcService::SetConfigValues(SysClkConfigValueList* configValues)
     }
 
     return 0;
-}
+}
+
+Result IpcService::SetReverseNXRTMode(ReverseNXMode mode) {
+    Config* config = ClockManager::GetInstance()->GetConfig();
+    config->SetReverseNXRTMode(mode);
+    return 0;
+}