can: tcan4x5x: cdev_to_priv(): remove stray empty line

This patch removes a stray empty line in the cdev_to_priv() function.

Fixes: ac33ffd3 ("can: m_can: let m_can_class_allocate_dev() allocate driver specific private data")
Link: https://lore.kernel.org/r/20210819111703.599686-1-mkl@pengutronix.de


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