be2net: fix FW default for VF tx-rate

BE3 FW initializes VF tx-rate to 100Mbps. Fix this to 10Gbps.

Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>