can: ems_pci: Fix code style, copyright and email address

Fix code style complained by checkpatch.pl, add Copyright and
fix email address

Signed-off-by: Gerhard Uttenthaler <uttenthaler@ems-wuensche.com>
Link: https://lore.kernel.org/all/20230120112616.6071-2-uttenthaler@ems-wuensche.com


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