net: atlantic: make function 'aq_ethtool_get_priv_flags', 'aq_ethtool_set_priv_flags' static

Fix sparse warnings:

drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c:706:5: warning: symbol 'aq_ethtool_get_priv_flags' was not declared. Should it be static?
drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c:713:5: warning: symbol 'aq_ethtool_set_priv_flags' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: ea4b4d7f ("net: atlantic: loopback tests via private flags")
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c

@@ -703,14 +703,14 @@ static void aq_set_msg_level(struct net_device *ndev, u32 data)
 	aq_nic->msg_enable = data;
 }
 
-u32 aq_ethtool_get_priv_flags(struct net_device *ndev)
+static u32 aq_ethtool_get_priv_flags(struct net_device *ndev)
 {
 	struct aq_nic_s *aq_nic = netdev_priv(ndev);
 
 	return aq_nic->aq_nic_cfg.priv_flags;
 }
 
-int aq_ethtool_set_priv_flags(struct net_device *ndev, u32 flags)
+static int aq_ethtool_set_priv_flags(struct net_device *ndev, u32 flags)
 {
 	struct aq_nic_s *aq_nic = netdev_priv(ndev);
 	struct aq_nic_cfg_s *cfg;