can: ems_usb: improve error reporting for error warning and error passive

This patch adds the missing CAN_ERR_CRTL to cf->can_id in case of
CAN_STATE_ERROR_WARNING or CAN_STATE_ERROR_PASSIVE

Signed-off-by: Martin Lederhilger <m.lederhilger@ds-automotion.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>