Merge branch 'make-sfc-siena-ko-specific-to-siena'

Martin Habets says:

====================
Make sfc-siena.ko specific to Siena

This series is a follow-up to the one titled "Move Siena into
a separate subdirectory".
It enhances the new sfc-siena.ko module to differentiate it from sfc.ko.

	Patches

Patches 1-5 create separate Kconfig options for Siena, and adjusts the
various names used for work items and directories.
Patch 6 reinstates SRIOV functionality in sfc-siena.ko.

	Testing

Various build tests were done such as allyesconfig, W=1 and sparse.
The new sfc-siena.ko and sfc.ko modules were tested on a machine with NICs
for both modules in them.
Inserting the updated sfc.ko and the new sfc-siena.ko modules at the same
time works, and no work items and directories exist with the same name.
====================

Link: https://lore.kernel.org/r/165228589518.696.7119477411428288875.stgit@palantir17.mph.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>