If kvaser_pciefd_bus_on() failed, we should call close_candev() to avoid
reference leak.

Fixes: 26ad340e ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201128133922.3276973-3-zhangqilong3@huawei.comSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>