net: hns3: Fixes the static checker error warning in hns3_get_link_ksettings()

This patch fixes the static check error warning in hns3_get_link_ksettings()
function by re-arranging the code.

Fixes: 496d03e9 ("net: hns3: Add Ethtool support to HNS3 Driver")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>