staging/comedi: remove workaround for !pci_driver.name

All pci drivers in drivers/ have the pci_driver.name field set, so we
can remove this workaround and the accompanying todo.

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>