backends/drm: also use modifiers by default for virtual outputs

src/backends/drm/virtual_egl_gbm_layer.cpp

@@ -97,7 +97,7 @@ bool VirtualEglGbmLayer::createGbmSurface()
 {
     static bool modifiersEnvSet = false;
     static const bool modifiersEnv = qEnvironmentVariableIntValue("KWIN_DRM_USE_MODIFIERS", &modifiersEnvSet) != 0;
-    const bool allowModifiers = ((m_eglBackend->gpu()->isNVidia() && !modifiersEnvSet) || (modifiersEnvSet && modifiersEnv));
+    const bool allowModifiers = !modifiersEnvSet || modifiersEnv;
 
     const auto tranches = m_eglBackend->dmabuf()->tranches();
     for (const auto &tranche : tranches) {