sfc: Use generic MDIO flow control auto-negotiation functions

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/sfc/ethtool.c
Simple merge

diff --cc drivers/net/sfc/mdio_10g.c
Simple merge

diff --cc drivers/net/sfc/mdio_10g.h
Simple merge

diff --cc drivers/net/sfc/net_driver.h
Simple merge

diff --cc drivers/net/sfc/tenxpress.c
Simple merge