can: kvaser_usb_leaf: do not report txerr and rxerr during bus-off

stable inclusion
from stable-v5.10.137
commit ca1a2c5388345fccee9a2f9d13fdc4aa52b955bb
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ca1a2c5388345fccee9a2f9d13fdc4aa52b955bb

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[ Upstream commit a5773208 ]

During bus off, the error count is greater than 255 and can not fit in
a u8.

Fixes: 7259124e ("can: kvaser_usb: Split driver into kvaser_usb_core.c and kvaser_usb_leaf.c")
Link: https://lore.kernel.org/all/20220719143550.3681-9-mailhol.vincent@wanadoo.fr


CC: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Wei Li <liwei391@huawei.com>