Add YAML and error function for MEM_GOODx faults

Add a section to the error and metadata YAML files for the MEM_GOODx
faults. Use that to update/generate a new elog-errors.hpp include file.

Update the power sequencer source to have a memGoodFault function for
handling callouts for MEM_GOODx type errors.

Change-Id: Ia08dc88f29f00f749e7995f97f37647b02135a2b
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 801773c..668568d 100644
--- a/org/open_power/Witherspoon/Fault.errors.yaml
+++ b/org/open_power/Witherspoon/Fault.errors.yaml
@@ -38,3 +38,6 @@
 
 - name: GPUOverTemp
   description: A GPU suffered an over-temperature fault
+
+- name: MemoryPowerFault
+  description: A memory device suffered a power fault