macsec: fix negative refcnt on parent link

macsec: fix negative refcnt on parent link

Orabug: 25243093

When creation of a macsec device fails because an identical device
already exists on this link, the current code decrements the refcnt on
the parent link (in ->destructor for the macsec device), but it had not
been incremented yet.

Move the dev_hold(parent_link) call earlier during macsec device
creation.

Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 0759e552bce7257db542e203a01a9ef8843c751e)
Signed-off-by: Ethan Zhao <ethan.zhao@oracle.com>