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/Loader/ResultCode.cs

@@ -6,18 +6,5 @@
         ErrorCodeShift = 9,
 
         Success = 0,
-
-        InvalidMemoryState = (51 << ErrorCodeShift) | ModuleId,
-        InvalidNro         = (52 << ErrorCodeShift) | ModuleId,
-        InvalidNrr         = (53 << ErrorCodeShift) | ModuleId,
-        MaxNro             = (55 << ErrorCodeShift) | ModuleId,
-        MaxNrr             = (56 << ErrorCodeShift) | ModuleId,
-        NroAlreadyLoaded   = (57 << ErrorCodeShift) | ModuleId,
-        NroHashNotPresent  = (54 << ErrorCodeShift) | ModuleId,
-        UnalignedAddress   = (81 << ErrorCodeShift) | ModuleId,
-        BadSize            = (82 << ErrorCodeShift) | ModuleId,
-        BadNroAddress      = (84 << ErrorCodeShift) | ModuleId,
-        BadNrrAddress      = (85 << ErrorCodeShift) | ModuleId,
-        BadInitialization  = (87 << ErrorCodeShift) | ModuleId
     }
 }