CH34x USB-Serial converter: `V3` pin needs to be power-output
While working on !3573 (merged) I saw that a most CH34x chips have the pin-type of V3
wrong. Also, it would be nice to slightly re-arrange the Power-Pins: the 3V regulator should be on the right side, as should the Vio-input pins. Then it will be easier to connect the VBUS pin directly to the USB plug.