net: sparx5: add mactable support

This adds the Sparx5 MAC tables: listening for MAC table updates and
updating on request.

Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: Bjarni Jonasson <bjarni.jonasson@microchip.com>
Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microchip/sparx5/Makefile

@@ -6,4 +6,4 @@
 obj-$(CONFIG_SPARX5_SWITCH) += sparx5-switch.o
 
 sparx5-switch-objs := sparx5_main.o sparx5_packet.o \
- sparx5_netdev.o sparx5_phylink.o sparx5_port.o
+ sparx5_netdev.o sparx5_phylink.o sparx5_port.o sparx5_mactable.o