power: supply: cros_usbpd: reclassify "default case!" as debug

This doesn't need to be printed every second as an error:
...
<3>[17438.628385] cros-usbpd-charger cros-usbpd-charger.3.auto: Port 1: default case!
<3>[17439.634176] cros-usbpd-charger cros-usbpd-charger.3.auto: Port 1: default case!
<3>[17440.640298] cros-usbpd-charger cros-usbpd-charger.3.auto: Port 1: default case!
...

Reduce priority from ERROR to DEBUG.

Signed-off-by: Grant Grundler <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
Signed-off-by: Sebastian Reichel <[e-mail]>

drivers/power/supply/cros_usbpd-charger.c

···
 		port->psy_current_max = 0;
 		break;
 	default:
-		dev_err(dev, "Port %d: default case!\n", port->port_number);
+		dev_dbg(dev, "Port %d: default case!\n", port->port_number);
 		port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
 	}