Remove the PowerSupplyUnderVoltageFault error

Since the VIN_UV_FAULT check was combined with the INPUT_FAULT_WARN
check, we no longer need this error. However, since they are now
combined, update the wording on PowerSupplyInputFault to indicate that
it could be due to an undervoltage condition.

Add a trailing clarification statement to check the cables and/or the
power source to the power supply, to avoid confusion now that we have
added the power supply to the call out.

Change-Id: I5bb0285ee1f2f866ad92decf8e679b26bff3f06f
Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
diff --git a/org/open_power/Witherspoon/Fault.errors.yaml b/org/open_power/Witherspoon/Fault.errors.yaml
index 451f0fa..96a57ad 100644
--- a/org/open_power/Witherspoon/Fault.errors.yaml
+++ b/org/open_power/Witherspoon/Fault.errors.yaml
@@ -1,7 +1,7 @@
-- name: PowerSupplyUnderVoltageFault
-  description: The power supply has indicated an input or under voltage fault condition.
 - name: PowerSupplyInputFault
-  description: The power supply has indicated an input fault or warn condition.
+  description: The power supply has indicated an input or under voltage
+               condition. Check the power supply cabling and/or input power
+               source.
 - name: PowerSupplyShouldBeOn
   description: The power supply indicated that it is not on when it should be.
 - name: PowerSupplyOutputOvercurrent