Improve IRoInterface logic (#809)

* hle: Improve IRoInterface logic

This commit contains a little rewrite of IRoInterface to fix some issues
that we were facing on some recent games (AC3 Remastered & Final Fantasy
VIII Remastered)

Related issues:

- https://github.com/Ryujinx/Ryujinx-Games-List/issues/196

* Address comments

Ryujinx.HLE/HOS/Services/Ro/ResultCode.cs

@@ -0,0 +1,27 @@
+namespace Ryujinx.HLE.HOS.Services.Ro
+{
+    enum ResultCode
+    {
+        ModuleId       = 22,
+        ErrorCodeShift = 22,
+
+        Success = 0,
+
+        InsufficientAddressSpace = (2 << ErrorCodeShift) | ModuleId,
+        AlreadyLoaded            = (3 << ErrorCodeShift) | ModuleId,
+        InvalidNro               = (4 << ErrorCodeShift) | ModuleId,
+        InvalidNrr               = (6 << ErrorCodeShift) | ModuleId,
+        TooManyNro               = (7 << ErrorCodeShift) | ModuleId,
+        TooManyNrr               = (8 << ErrorCodeShift) | ModuleId,
+        NotAuthorized            = (9 << ErrorCodeShift) | ModuleId,
+
+        InvalidNrrType           = (10 << ErrorCodeShift) | ModuleId,
+
+        InvalidAddress           = (1025 << ErrorCodeShift) | ModuleId,
+        InvalidSize              = (1026 << ErrorCodeShift) | ModuleId,
+        NotLoaded                = (1028 << ErrorCodeShift) | ModuleId,
+        NotRegistered            = (1029 << ErrorCodeShift) | ModuleId,
+        InvalidSession           = (1030 << ErrorCodeShift) | ModuleId,
+        InvalidProcess           = (1031 << ErrorCodeShift) | ModuleId,
+    }
+}