This patch adds the 57791 and 57795 to the list of devices that only
support 10 and 100 Mbps speeds.
Signed-off-by: NMatt Carlson <mcarlson@broadcom.com>
Reviewed-by: NMichael Chan <mchan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>