can: bxcan: bxcan_start_xmit(): use can_dev_dropped_skb() instead of can_dropped_invalid_skb()

In addition to can_dropped_invalid_skb(), the helper function
can_dev_dropped_skb() checks whether the device is in listen-only mode and
discards the skb accordingly.

Replace can_dropped_invalid_skb() by can_dev_dropped_skb() to also drop
skbs in for listen-only mode.

Reported-by: Marc Kleine-Budde <mkl@pengutronix.de>
Closes: https://lore.kernel.org/all/20251017-bizarre-enchanted-quokka-f3c704-mkl@pengutronix.de/
Fixes: f00647d8 ("can: bxcan: add support for ST bxCAN controller")
Link: https://patch.msgid.link/20251017-fix-skb-drop-check-v1-1-556665793fa4@pengutronix.de


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