configurations: mtjefferson_mb: Update 12V_FAN power state

This commit updates power state config of 12V_FAN sensor from
"ChassisOn" to "Always" because this sensor is available all the time.

Change-Id: Ic43fb9bb7ca940b492cc1d681b2dd56dafcf71c8
Signed-off-by: Dung Cao <dung@os.amperecomputing.com>
Signed-off-by: Chau Ly <chaul@amperecomputing.com>
diff --git a/configurations/mtjefferson_mb.json b/configurations/mtjefferson_mb.json
index 776bc92..b06f0eb 100644
--- a/configurations/mtjefferson_mb.json
+++ b/configurations/mtjefferson_mb.json
@@ -248,7 +248,6 @@
                 "MinValue": 0,
                 "Name": "12V_FAN",
                 "PollRate": 15,
-                "PowerState": "ChassisOn",
                 "ScaleFactor": 0.130434783,
                 "Thresholds": [
                     {