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>
diff --git a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/host/op-host-control/cfam_override@.service b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/host/op-host-control/cfam_override@.service
index 8b989bb..b1343a3 100644
--- a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/host/op-host-control/cfam_override@.service
+++ b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/host/op-host-control/cfam_override@.service
@@ -8,7 +8,7 @@
 After=fsi-scan@%i.service
 Conflicts=obmc-chassis-poweroff@%i.target
 ConditionPathExists=!/run/openbmc/chassis@%i-on
-ConditionFileExists=/var/lib/obmc/cfam_overrides
+ConditionPathExists=/var/lib/obmc/cfam_overrides
 
 [Service]
 ExecStart={sbindir}/openpower-proc-control CFAMOverride