Add Memory Subsystem FIR support

  Add FIR.md to memory/docs
  Change some PHY workarounds, lab says hold off
  Add MC FIR to SBE code

Change-Id: I1e69145f4d393d9185b93462ac42bbc9570983ad
Original-Change-Id: I904079ab84d978637dd2b3e638c90d59395019fd
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/33060
Dev-Ready: Brian R. Silver <bsilver@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Matt K. Light <mklight@us.ibm.com>
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Louis Stermole <stermole@us.ibm.com>
Reviewed-by: JACOB L. HARVEY <jlharvey@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/55443
CI-Ready: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Tested-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/import/chips/p9/procedures/xml/attribute_info/chip_ec_attributes.xml

@@ -500,6 +500,23 @@
     </chipEcFeature>
   </attribute>
 
+  <attribute>
+    <id>ATTR_CHIP_EC_FEATURE_MSS_WAT_DEBUG_ATTN</id>
+    <targetType>TARGET_TYPE_PROC_CHIP</targetType>
+    <description>
+      WAT Debug Attention work-around for Nimbus DD1.0
+    </description>
+    <chipEcFeature>
+      <chip>
+        <name>ENUM_ATTR_NAME_NIMBUS</name>
+        <ec>
+          <value>0x20</value>
+          <test>LESS_THAN</test>
+        </ec>
+      </chip>
+    </chipEcFeature>
+  </attribute>
+
   <attribute>
     <id>ATTR_CHIP_EC_FEATURE_MSS_HW392781_RDARRAY_CLKGATE</id>
     <targetType>TARGET_TYPE_PROC_CHIP</targetType>