net: cpsw: add missing of_node_put() in cpsw_probe_dt()

net: cpsw: add missing of_node_put() in cpsw_probe_dt()

BugLink: https://bugs.launchpad.net/bugs/1978240
commit 95098d5ac2551769807031444e55a0da5d4f0952 upstream.

'tmp_node' need be put before returning from cpsw_probe_dt(),
so add missing of_node_put() in error path.

Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>