[util] Enable forceSamplerTypeSpecConstants for SpellForce 2: Faith in Destiny

The game binds a 2D texture to a 3D (volume) sampler which causes the readback to be 0 0 0 0 on native, whereas we can workaround it and see the intended texture and cool refracty effect that would have rendered on older real hardware 👏

Closes #1645

src/util/config/config.cpp

@@ -348,6 +348,10 @@ namespace dxvk {
       { "d3d9.longMad",                     "True" },
       { "d3d9.invariantPosition",           "True" },
     }} },
+    /* SpellForce 2: Faith in Destiny             */
+    { R"(\\SpellForce2FaithInDestiny\.exe$)", {{
+      { "d3d9.forceSamplerTypeSpecConstants", "True" },
+    }} },
   }};