misc: smpro-errmon: Add dimm training failure syndrome

Adds event_dimm[0-15]_syndrome sysfs to report the failure syndrome
to BMC when DIMM training failed.

Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230310083416.3670980-3-quan@os.amperecomputing.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>