cxgb4: Fix incorrect PFVF CMASK

With Hard-Wired firmware configuration it was incorrectly provisioning the VFs
Channel Access Rights Mask.

Signed-off-by: Jay Hernandez <jay@chelsio.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>