net: dsa: mv88e6xxx: rename new FID helper

Rename the _mv88e6xxx_fid_new helper to mv88e6xxx_atu_new to get rid of
the old underscore prefix naming convention and be consistent with the
rest of the chip-wide ATU API.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/chip.c

@@ -1556,7 +1556,7 @@ static int _mv88e6xxx_stu_loadpurge(struct mv88e6xxx_chip *chip,
 	return _mv88e6xxx_vtu_cmd(chip, GLOBAL_VTU_OP_STU_LOAD_PURGE);
 }
 
-static int _mv88e6xxx_fid_new(struct mv88e6xxx_chip *chip, u16 *fid)
+static int mv88e6xxx_atu_new(struct mv88e6xxx_chip *chip, u16 *fid)
 {
 	DECLARE_BITMAP(fid_bitmap, MV88E6XXX_N_FID);
 	struct mv88e6xxx_vtu_entry vlan;
@@ -1610,7 +1610,7 @@ static int _mv88e6xxx_vtu_new(struct mv88e6xxx_chip *chip, u16 vid,
 	};
 	int i, err;
 
-	err = _mv88e6xxx_fid_new(chip, &vlan.fid);
+	err = mv88e6xxx_atu_new(chip, &vlan.fid);
 	if (err)
 		return err;