can: gs_usb: gs_cmd_reset(): rename variable holding struct gs_can pointer to dev

Most of the driver uses the variable "dev" to point to the struct
gs_can. Use the same name in gs_cmd_reset(), too. Rename gsdev to dev.

Fixes: d08e973a ("can: gs_usb: Added support for the GS_USB CAN devices")
Link: https://lore.kernel.org/all/20220921193902.575416-2-mkl@pengutronix.de


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