net: ti: icssg-prueth: Add Support for Multicast filtering with VLAN in HSR mode

net: ti: icssg-prueth: Add Support for Multicast filtering with VLAN in HSR mode

Add multicast filtering support for VLAN interfaces in HSR offload mode
for ICSSG driver.

The driver calls vlan_for_each() API on the hsr device's ndev to get the
list of available vlans for the hsr device. The driver then sync mc addr of
vlan interface with a locally mainatined list emac->vlan_mcast_list[vid]
using __hw_addr_sync_multiple() API.

The driver then calls the sync / unsync callbacks.

In the sync / unsync call back, driver checks if the vdev's real dev is
hsr device or not. If the real dev is hsr device, driver gets the per
port device using hsr_get_port_ndev() and then driver passes appropriate
vid to FDB helper functions.

Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>