dcmi : get temperature readings: witherspoon json

This commit adds a json file that specifies instance numbers and d-bus
paths to look-up for temperature readings.

Change-Id: I501f75214042c5b1ad56e64d0893e142a90a2efc
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
2 files changed