net: ftgmac100: add missing error return code in ftgmac100_probe()

net: ftgmac100: add missing error return code in ftgmac100_probe()

BugLink: https://bugs.launchpad.net/bugs/1938199
[ Upstream commit 52af13a41489d7bbc1932d17583eff6e5fffc820 ]

The variables will be free on path err_phy_connect, it should
return error code, or it will cause double free when calling
ftgmac100_remove().

Fixes: bd466c3fb5a4 ("net/faraday: Support NCSI mode")
Fixes: 39bfab8844a0 ("net: ftgmac100: Add support for DT phy-handle property")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>