Add in support for detecting an output overcurrent fault

When analyzing the STATUS_WORD bits, check if the IOUT_OC_FAULT bit is
on. That bit indicates that an output overcurrent fault condition has
occurred. Call out the power supply reporting that.

Change-Id: I18c7cd981ffc1b73ab52c90d32ba34195013e65e
Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
diff --git a/xyz/openbmc_project/Power/Fault.errors.yaml b/xyz/openbmc_project/Power/Fault.errors.yaml
index 4f270e4..f49234b 100644
--- a/xyz/openbmc_project/Power/Fault.errors.yaml
+++ b/xyz/openbmc_project/Power/Fault.errors.yaml
@@ -4,6 +4,8 @@
   description: The power supply has indicated an input fault or warn condition.
 - name: PowerSupplyShouldBeOn
   description: The power supply indicated that it is not on when it should be.
+- name: PowerSupplyOutputOvercurrent
+  description: The power supply detected an output overcurrent fault condition.
 - name: Shutdown
   description: A power off was issued because a power fault was detected