- 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/common/src/client/ipc.c

@@ -114,3 +114,8 @@ Result sysclkIpcSetConfigValues(SysClkConfigValueList* configValues)
 {
     return serviceDispatchIn(&g_sysclkSrv, SysClkIpcCmd_SetConfigValues, *configValues);
 }
+
+Result sysclkIpcSetReverseNXRTMode(ReverseNXMode mode)
+{
+    return serviceDispatchIn(&g_sysclkSrv, SysClkIpcCmd_SetReverseNXRTMode, mode);
+}