[c-nsp] Missing CISCO-ENTITY-SENSOR entries on newer sup720 hw

[Phil Mayers]

All,

I recently discovered the quite comprehensive coverage of both the
entPhysicalTable and CISCO-ENTITY-SENSOR mib. In particular, a vast
array of the sensors on our 6500s are exposed through it...

...but only on the 4.4 hw revision. The newer sups, on 5.4 hw revision,
appear to omit a whole load of sensors from the MIB. This is on
identical software versions (SXF10).

Anyone else seen this?