can: ems_pci: Remove unnecessary (void*) conversions

No need cast (void*) to (struct ems_pci_card *).

Signed-off-by: Wu Yunchuan <yunchuan@nfschina.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20230717031221.55073-1-yunchuan@nfschina.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>