can: dev: can_restart(): move debug message and stats after successful restart

[ Upstream commit f0e0c809 ]

Move the debug message "restarted" and the CAN restart stats_after_
the successful restart of the CAN device, because the restart may
fail.

While there update the error message from printing the error number to
printing symbolic error names.

Link: https://lore.kernel.org/all/20231005-can-dev-fix-can-restart-v2-4-91b5c1fd922c@pengutronix.de


Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
[mkl: mention stats in subject and description, too]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Stable-dep-of: c1f3f979 ("can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode")
Signed-off-by: Sasha Levin <sashal@kernel.org>