ixgbe: fix PHY ID for X550

DPDK commit message

net/ixgbe/base: fix PHY ID for X550
Function ixgbe_get_phy_type_from_id() for X550_PHY_ID2 and
X550_PHY_ID3 always return ixgbe_phy_unknown instead of ixgbe_phy_aq
because phy ID's last 4 bits are always masked, and should not be
taken into account when selecting phy type.

This patch adds default PHY ID for X550 devices with mask on last 4
bits (0xFFFFFFF0), and fixes the switch statement to use it.

Fixes: 58ddc80 ("ixgbe/base: add new X550 PHY ids")
Cc: stable@dpdk.org

Signed-off-by: Radoslaw Tyl <radoslawx.tyl@intel.com>
Reviewed-by: Piotr Skajewski <piotrx.skajewski@intel.com>
Reviewed-by: Alice Michael <alice.michael@intel.com>

Obtained from: DPDK (a9f5a3b)
MFC after: 1 week