Merge branch 'sfp-SFF-module-support'

Russell King says:

====================
Add SFF module support

Add support for SFF modules.  SFF modules are similar to SFP modules,
but they have fewer control signals, and are soldered down rather than
pluggable.

They also have different IDs in the EEPROM to identify as soldered down
SFF modules.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>