Refactor SVC handler (#540)

* Refactor SVC handler

* Get rid of KernelErr

* Split kernel code files into multiple folders

Ryujinx.HLE/HOS/Kernel/Memory/KTransferMemory.cs

@@ -0,0 +1,14 @@
+namespace Ryujinx.HLE.HOS.Kernel.Memory
+{
+    class KTransferMemory
+    {
+        public ulong Address { get; private set; }
+        public ulong Size    { get; private set; }
+
+        public KTransferMemory(ulong address, ulong size)
+        {
+            Address = address;
+            Size    = size;
+        }
+    }
+}