CPU: Add low-power PPTC load mode.

Specifically, this setting causes the translation load core count to get reduced by two-thirds, for lower-power but still fast loading, and for unstable CPUs.

src/Ryujinx/AppHost.cs

@@ -406,6 +406,8 @@ namespace Ryujinx.Ava
 
         public void Start()
         {
+            ARMeilleure.Optimizations.EcoFriendly = ConfigurationState.Instance.System.EnableLowPowerPtc;
+
             if (OperatingSystem.IsWindows())
             {
                 _windowsMultimediaTimerResolution = new WindowsMultimediaTimerResolution(1);