meta-ibm/wspoon: Switch fan presence to JSON config

Enable the use of JSON and install the fan presence JSON config file
into the witherspoon image. The other fan applications will continue to
use their respective YAML build time config file(s).

Tested:
    Built witherspoon image, uses JSON config
    Built mihawk image, continues to use YAML

Change-Id: Ia88340bb7ca704800aa8cdc216f4e95c10f4b61d
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
3 files changed