Add XML documentation to Ryujinx.Graphics.Gpu.State

Ryujinx.Graphics.Gpu/State/GpuVa.cs

@@ -1,10 +1,17 @@
 namespace Ryujinx.Graphics.Gpu.State
 {
+    /// <summary>
+    /// Split GPU virtual address.
+    /// </summary>
     struct GpuVa
     {
         public uint High;
         public uint Low;
 
+        /// <summary>
+        /// Packs the split address into a 64-bits address value.
+        /// </summary>
+        /// <returns></returns>
         public ulong Pack()
         {
             return Low | ((ulong)High << 32);