adding support for VLAN interface for cpsw.

CPSW VLAN Capability
* Can filter VLAN packets in Hardware
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add helper functions for VLAN ALE implementations for Add, Delete
Dump VLAN related ALE entries
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Adding multicast address to ALE table via netdev ops to subscribe, transmit
or receive multicast frames to and from the network
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

TI CPSW ethernet switch has a built-in address lookup engine.  This patch adds
the code necessary for programming this module.
Signed-off-by: NCyril Chemparathy <cyril@ti.com>
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>