Make PPTC state non-static (#4157)

* Make PPTC state non-static

* DiskCacheLoadState can be null

Ryujinx.Cpu/LoadState.cs

@@ -0,0 +1,12 @@
+namespace Ryujinx.Cpu
+{
+    /// <summary>
+    /// Load state.
+    /// </summary>
+    public enum LoadState
+    {
+        Unloaded,
+        Loading,
+        Loaded
+    }
+}