sfc: Fix reporting of PHY id

Shuffle bits of the OUI into the conventional written order.

Replace PHY id component macros with functions.

Zero-pad PHY id components in log messages.

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

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/xfp_phy.c
Simple merge