Teach jedec_dimm(4) to be more forgiving of non-fatal errors.
It looks like some DIMMs claim to have a TSOD, but actually don't. Some
claim they weren't able to change the SPD page, but they did. Neither of
those should be fatal errors.
Submitted by: Greg V <firstname.lastname@example.org>
Reported by: Greg V <email@example.com>
Reviewed by: cem
MFC after: 1 weeks
Sponsored by: Panasas
Differential Revision: https://reviews.freebsd.org/D19681