ixv: fix x550 VF link speed reported

DPDK commit message

net/ixgbe/base: fix 5G link speed reported on VF
When 5000 Base-T was set on PF the VF reported 100 Base-T. This patch
changes ixgbe_check_mac_link_vf function where there was an incorrect
conditional which checks using PF mac types, now it is correctly
using VF mac types.

Fixes: 12e2090 ("net/ixgbe/base: include new speeds in VFLINK interpretation")
Cc: stable@dpdk.org

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

Obtained from: DPDK (9eb7fdb)

(cherry picked from commit ab92cab02633580f763a38a329a5b25050bb4fbf)