Force non-numeric for compact sensor records

In the IPMI spec, compact sensors have the numeric format reserved
and mandate an implementation set it to '3'.  This mandate seems
to have been ignored by some implementations.  Force the value to be
3 for all compact sensor records and assume the reserved bits may never
be used in a compact sensor.

Change-Id: I88f5d7b533869809f213ab0c5379b276af50cd23
Merge "Force non-numeric for compact sensor records"