IXGBE_VLVF
bits = IXGBE_READ_REG(hw, IXGBE_VLVF(regindex));
IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), 0);
IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), IXGBE_VLVF_VIEN | vlan);
IXGBE_WRITE_REG(hw, IXGBE_VLVF(offset), 0);
vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(idx));
IXGBE_WRITE_REG(hw, IXGBE_VLVF(idx), 0);
u32 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(i));
vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(i));
IXGBE_WRITE_REG(hw, IXGBE_VLVF(i), 0);