There are 2 MACIDs stored in the control module of the am33xx. These are
read by the cpsw driver if no valid MACID was found in the devicetree.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Reviewed-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: David S. Miller <davem@davemloft.net>