Implement code memory syscalls (#2958)

* Implement code memory syscalls

* Remove owner process validation

* Add 32-bit code memory syscalls

* Remove unused field

Ryujinx.HLE/HOS/Kernel/SupervisorCall/CodeMemoryOperation.cs

@@ -0,0 +1,10 @@
+namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
+{
+    enum CodeMemoryOperation : uint
+    {
+        Map,
+        MapToOwner,
+        Unmap,
+        UnmapFromOwner
+    };
+}