- 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/config.cpp

@@ -35,6 +35,8 @@ Config::Config(std::string path)
     {
         this->configValues[i] = sysclkDefaultConfigValue((SysClkConfigValue)i);
     }
+
+    this->reverseNXRTMode = ReverseNX_NotFound;
 }
 
 Config::~Config()
@@ -480,3 +482,15 @@ bool Config::SetConfigValues(SysClkConfigValueList* configValues, bool immediate
 
     return true;
 }
+
+ReverseNXMode Config::GetReverseNXRTModeAndClear() {
+    std::scoped_lock lock{this->reverseNXRTMutex};
+    ReverseNXMode mode = this->reverseNXRTMode;
+    this->reverseNXRTMode = ReverseNX_GotValue;
+    return mode;
+}
+
+void Config::SetReverseNXRTMode(ReverseNXMode mode) {
+    std::scoped_lock lock{this->reverseNXRTMutex};
+    this->reverseNXRTMode = mode;
+}