net: dsa: bcm_sf2: put device node before return

stable inclusion
from stable-5.10.14
commit 370ce41d2e5847f120e251067e4943e5fd1a3541
bugzilla: 48051

--------------------------------

commit cf3c4663 upstream.

Put the device node dn before return error code on failure path.

Fixes: 461cd1b0 ("net: dsa: bcm_sf2: Register our slave MDIO bus")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Link: https://lore.kernel.org/r/20210121123343.26330-1-bianpan2016@163.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>