net: phylink: Fix phylink_err() function name error in phylink_major_config

[ Upstream commit d82c6c1a ]

if pl->mac_ops->mac_finish() failed, phylink_err should use
"mac_finish" instead of "mac_prepare".

Fixes: b7ad14c2

 ("net: phylink: re-implement interface configuration with PCS")
Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>