threshold: fix up documentation per sensor.value

The Sensor.Value has a list of "recognized hierarchies" which is
similarly replicated in all of the Threshold interfaces.  The lists
in the Threshold objects were incomplete, so update them.

Also, make trivial whitespace / formatting changes to ensure linewrap
is at the appropriate (80) columns.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I6bd76ca423e1ea3c2e0c7ce59e10dce1125eb6d1
diff --git a/yaml/xyz/openbmc_project/Sensor/Threshold/Warning.interface.yaml b/yaml/xyz/openbmc_project/Sensor/Threshold/Warning.interface.yaml
index 4182eca..6310306 100644
--- a/yaml/xyz/openbmc_project/Sensor/Threshold/Warning.interface.yaml
+++ b/yaml/xyz/openbmc_project/Sensor/Threshold/Warning.interface.yaml
@@ -9,7 +9,9 @@
       current
       power
       energy
-
+      utilization
+      airflow
+      pressure
 
     Additionally, any object implementing Sensor.Threshold.Warning must also
     implement Sensor.Value.
@@ -43,7 +45,6 @@
 
           WarningAlarmLow may be set to False to clear an alarm condition.
           The behavior of setting WarningAlarmLow to True is undefined.
-
 signals:
     - name: WarningHighAlarmAsserted
       description: >