ixgbe: fix namespacecheck issue

Set ixgbe_identify_82599() as static

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ixgbe/ixgbe_82599.c

@@ -1775,7 +1775,7 @@ static s32 ixgbe_start_hw_82599(struct ixgbe_hw *hw)
  *  If PHY already detected, maintains current PHY type in hw struct,
  *  otherwise executes the PHY detection routine.
  **/
-s32 ixgbe_identify_phy_82599(struct ixgbe_hw *hw)
+static s32 ixgbe_identify_phy_82599(struct ixgbe_hw *hw)
 {
 	s32 status = IXGBE_ERR_PHY_ADDR_INVALID;