can: esd_usb: Use consistent prefix ESD_USB_ for macros

Rename the following macros:
- ESD_RTR to ESD_USB_RTR
- ESD_EV_CAN_ERROR_EXT to ESD_USB_EV_CAN_ERROR_EXT

Additionally remove the double newline trailing to definition
of ESD_USB_RTR.

Signed-off-by: Frank Jungclaus <frank.jungclaus@esd.eu>
Link: https://lore.kernel.org/r/20230523173105.3175086-3-frank.jungclaus@esd.eu


Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>