oneshot services should only be run once

Still chasing root cause of openbmc/openbmc#3466 but either way, these
services should be configured to only ever run once. They do one-time
things and do not make sense to be run multiple times.

Change-Id: I8549c4875ba2eef0a274517ba12b3f5703b00cee
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/recipes-phosphor/sensors/phosphor-hwmon/phosphor-max31785-msl@.service b/recipes-phosphor/sensors/phosphor-hwmon/phosphor-max31785-msl@.service
index d9de6c0..c007f11 100644
--- a/recipes-phosphor/sensors/phosphor-hwmon/phosphor-max31785-msl@.service
+++ b/recipes-phosphor/sensors/phosphor-hwmon/phosphor-max31785-msl@.service
@@ -9,3 +9,4 @@
 ExecStart=/usr/bin/env max31785-msl -p "${{PATHS}}" -b ${{BUS}} -r ${{REVISION}}
 EnvironmentFile={envfiledir}/obmc/hwmon-max31785/%I.conf
 SyslogIdentifier=max31785-msl
+RemainAfterExit=yes