Fix the detection for the Winbond W83697SF. Unfortunately the revision
has a slightly different format than that of the W83697UF/UG so we have
to hack around it a bit.
This patch has been verified to work on real hardware by
Idwer Vollering <email@example.com> on IRC (thanks!).
Signed-off-by: Uwe Hermann <firstname.lastname@example.org>
Acked-by: Ronald G. Minnich <email@example.com>