move core init code to dwc2 common. update/correct build for esppressif

examples/typec/power_delivery/src/main.c

@@ -71,7 +71,7 @@ int main(void)
   }
 }
 
-#if CFG_TUSB_MCU == OPT_MCU_ESP32S2 || CFG_TUSB_MCU == OPT_MCU_ESP32S3
+#if TUSB_MCU_VENDOR_ESPRESSIF
 void app_main(void)
 {
   main();