cfam_override@.service - run on ConditionPathExists

ConditionFileExists doesn't exist. This commit updates the run
condition for cfam_override@.service to ConditionPathExists,
which does exist and is the appropriate condition for the service.

Resolves openbmc/openbmc#1582

Change-Id: I24f233bc61c1d6c93ea8c237ab85da365c5d6220
Signed-off-by: Michael Tritz <mtritz@us.ibm.com>
1 file changed