[util] Set sync interval override for P3R

src/util/config/config.cpp

@@ -909,6 +909,11 @@ namespace dxvk {
     { R"(\\Metro Exodus Enhanced Edition\\MetroExodus\.exe$)", {{
       { "dxvk.hideIntegratedGraphics",      "True" },
     }} },
+    /* Persona 3 Reload - disables vsync by default and
+     * runs into severe frame latency issues on Deck. */
+    { R"(\\P3R\.exe$)", {{
+      { "dxgi.syncInterval",                "1" },
+    }} },
   }};