Remove check for NAN policy in Controller.
Remove check for NAN policy in Controller.

- Agents are expected to be able to handle NAN to indicate a default
  value for a policy.
- On a single node, send_down will not be called, so adjust_platform
  should handle NAN.

Change-Id: I5e041f9f6b3be118a1d08b1011ecb3db8e4e78fc
Signed-off-by: Diana Guttman <98d11df29868673c9a01b97a41154316626a31b0@intel.com>

geopm/geopm,cmcantalupo/geopm,geopm/geopm,cmcantalupo/geopm,geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm