adcsensor: Add CPU presence checking

This adds a match to catch cpu presence coming from
cpusensor.

Tested: ipmitool sensor list no longer showed ADCs that
monitored  unavailable CPU

Change-Id: I39c067e5da3565c5b229cc19ed4ccf7767c1e85c
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/service_files/xyz.openbmc_project.adcsensor.service b/service_files/xyz.openbmc_project.adcsensor.service
index 666ff16..536b318 100644
--- a/service_files/xyz.openbmc_project.adcsensor.service
+++ b/service_files/xyz.openbmc_project.adcsensor.service
@@ -1,6 +1,7 @@
 [Unit]
 Description=Adc Sensor
 StopWhenUnneeded=false
+Before=xyz.openbmc_project.cpusensor.service
 
 [Service]
 Restart=always