[Nokia N-Gage] Re-enable FPS counter, fix link in README.

- Re-enable FPS counter, which is hidden by default anyway - but essential while working on an actual project.
- Fix link in the platform's README.
- Re-order list of supported platforms (alphabetical order to maintain consistency).

src/render/ngage/SDL_render_ngage.cpp

@@ -512,7 +512,6 @@ void CRenderer::Flip()
         return;
     }
 
-#ifdef SDL_VIDEO_RENDER_NGAGE_FPS
     iRenderer->Gc()->UseFont(iFont);
 
     if (iShowFPS && iRenderer->Gc()) {
@@ -537,7 +536,6 @@ void CRenderer::Flip()
         iRenderer->Gc()->DrawText(_L(""), TPoint(0, 0));
     }
     iRenderer->Gc()->DiscardFont();
-#endif // SDL_VIDEO_RENDER_NGAGE_FPS
     iRenderer->Flip(iDirectScreen);
 
     // Keep the backlight on.
@@ -571,7 +569,6 @@ void CRenderer::SetClipRect(TInt aX, TInt aY, TInt aWidth, TInt aHeight)
     }
 }
 
-#ifdef SDL_VIDEO_RENDER_NGAGE_FPS
 void CRenderer::UpdateFPS()
 {
     static TTime lastTime;
@@ -593,7 +590,6 @@ void CRenderer::UpdateFPS()
         lastTime = currentTime;
     }
 }
-#endif
 
 void CRenderer::SuspendScreenSaver(TBool aSuspend)
 {
@@ -688,7 +684,6 @@ void CRenderer::HandleEvent(const TWsEvent &aWsEvent)
         timestamp = SDL_GetPerformanceCounter();
         SDL_SendKeyboardKey(timestamp, 1, aWsEvent.Key()->iCode, ConvertScancode(aWsEvent.Key()->iScanCode), true);
 
-#ifdef SDL_VIDEO_RENDER_NGAGE_FPS
         if (aWsEvent.Key()->iScanCode == EStdKeyHash) {
             if (iShowFPS) {
                 iShowFPS = EFalse;
@@ -696,7 +691,6 @@ void CRenderer::HandleEvent(const TWsEvent &aWsEvent)
                 iShowFPS = ETrue;
             }
         }
-#endif
 
         break;
     case EEventKeyUp: /* Key events */