net: hsr: remove one synchronize_rcu() from hsr_del_port()

Use kfree_rcu() instead of synchronize_rcu()+kfree().

This might allow syzbot to fuzz HSR a bit faster...

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250103101148.3594545-1-edumazet@google.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>