soft-off: ensure pldm soft svc stopped on hard poweroff

There is a new pldmSoftPowerOff.service that will be utilized on PLDM
based systems to notify the host to power off. Need to ensure this
service is stopped if the user requests a hard chassis power off.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Ib82ec794020c7bb92f5a92524c553c6407e8b128
diff --git a/target_files/obmc-chassis-hard-poweroff@.target b/target_files/obmc-chassis-hard-poweroff@.target
index 87ce0a9..e5571dc 100644
--- a/target_files/obmc-chassis-hard-poweroff@.target
+++ b/target_files/obmc-chassis-hard-poweroff@.target
@@ -7,4 +7,5 @@
 Conflicts=obmc-chassis-powerreset@%i.target
 Conflicts=obmc-host-shutdown@%i.target
 Conflicts=xyz.openbmc_project.Ipmi.Internal.SoftPowerOff.service
+Conflicts=pldmSoftPowerOff.service
 RefuseManualStop=yes