sfc: Add support for QT2025C PHY

This is a new PHY supporting SFP+ modules, used in the SFN4112F
reference design.  It is similar to the QT2022C2 and shares much of
its support code.

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

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

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

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

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