Refactor ifp from adapter to ixgbe_interface
refactor tx_rings to interface
refactor rx_rings to interface
refactor queues into interface
refactor vfta handling to interface
refactor media into interface
Make rx_rings reference an interface, not the adapter
Make tx_rings refer to an interface, not the adapter
refactor ifnet methods to take interface as param
refactor hw vlan handling to take interface as arg
refactor media handling to not take ifnets as args
refactor setup_interface to take an interface arg
refactor dma_malloc/free to not take adapter arg
refactor ix_queue to refer to an interface
refactor ixgbe_queues to take interface as arg
refactor transmitter enable to work on interface
refactor free_transmit_structures to take an interface
Refactor buf_sz into interface
refactor rx init to work on interfaces where possible
refactor intr enable/disable to take interface arg