net: ethernet: use phylink_set_10g_modes()

Update three drivers to use the new phylink_set_10g_modes() helper:
Cadence macb, Freescale DPAA2 and Marvell PP2.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>