[util] Spoof Nvidia cards for Crysis 3

The game for some reason runs significantly slower in CPU-bound scenarios
when it recognizes an AMD GPU. On the other hand, there seems to be a small
performance hit on an actual Nvidia GPU (GTX 670) in GPU-bound scenarios when
doing this, but on most setups the tradeoff should be worth it.

src/util/config/config.cpp

@@ -148,6 +148,10 @@ namespace dxvk {
     { R"(\\mgsvtpp\.exe$)", {{
       { "dxvk.enableOpenVR",                "False" },
     }} },
+    /* Crysis 3 - slow if it notices AMD card     */
+    { R"(\\Crysis3\.exe$)", {{
+      { "dxgi.customVendorId",              "10de" },
+    }} },
   }};