Fix power reading value check
Fix power reading value check

Change-Id: I16aab241653808edcd50264b7048da41c1a387f6
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation