Check the SDL_VIDEO_RENDER_??? macros with #if instead of #ifdef

Allows users to disable them by defining them as 0.

Closes https://github.com/libsdl-org/SDL/issues/8996
(cherry picked from commit d0731ab9a3)

src/render/direct3d11/SDL_render_winrt.cpp

@@ -20,7 +20,7 @@
 */
 #include "../../SDL_internal.h"
 
-#if defined(SDL_VIDEO_RENDER_D3D11) && !defined(SDL_RENDER_DISABLED)
+#if SDL_VIDEO_RENDER_D3D11
 
 #include "SDL_syswm.h"
 #include "../../video/winrt/SDL_winrtvideo_cpp.h"
@@ -109,6 +109,6 @@ D3D11_GetCurrentRotation()
     return DXGI_MODE_ROTATION_IDENTITY;
 }
 
-#endif /* SDL_VIDEO_RENDER_D3D11 && !SDL_RENDER_DISABLED */
+#endif /* SDL_VIDEO_RENDER_D3D11 */
 
 /* vi: set ts=4 sw=4 expandtab: */