lan743x now fails to build when CONFIG_CRC16 is disabled:
drivers/net/ethernet/microchip/lan743x_main.o: In function crc16'
Force it on like all other users do.
Fixes: 4d94282afd95 ("lan743x: Add power management support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>