machine/rp2040: turn off pullup/down when not input type not specified

Signed-off-by: deadprogram <ron@hybridgroup.com>

src/machine/machine_rp2040_gpio.go

@@ -181,6 +181,7 @@ func (p Pin) Configure(config PinConfig) {
 		rp.SIO.GPIO_OE_SET.Set(mask)
 	case PinInput:
 		p.setFunc(fnSIO)
+		p.pulloff()
 	case PinInputPulldown:
 		p.setFunc(fnSIO)
 		p.pulldown()