Refactoring result codes (#731)

* refactoring result codes

- Add a main enum who can handle some orphalin result codes and the default `ResultCode.Success` one.
- Add sub-enum by services when it's needed.
- Remove some empty line.
- Recast all service calls to ResultCode.
- Remove some unneeded static declaration.
- Delete unused `NvHelper` class.

* NvResult is back

* Fix

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

@@ -0,0 +1,23 @@
+namespace Ryujinx.HLE.HOS.Services.Ldr
+{
+    enum ResultCode
+    {
+        ModuleId       = 9,
+        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
+    }
+}