Updates to run HW VREF cal by default

This code runs the HW VREF calibrations (both WR and RD VREF)
by default if it is supported by the HW.  Four new attributes are
added to handle whether HW VREF cal should be run and with what overrides
it needs to be run.

Change-Id: I89f3d2abea9a16ceecd2e7e9552f5ed27135b2f3
Original-Change-Id: I3ed63794e955ee8c94cffce0b98dba58886e4a9d
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/36803
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Reviewed-by: Brian R. Silver <bsilver@us.ibm.com>
Reviewed-by: RYAN P. KING <rpking@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: ANDRE A. MARIN <aamarin@us.ibm.com>
Reviewed-by: Louis Stermole <stermole@us.ibm.com>
Reviewed-by: JACOB L. HARVEY <jlharvey@us.ibm.com>
Reviewed-by: Matt K. Light <mklight@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>

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

@@ -2388,6 +2388,23 @@
     </chipEcFeature>
   </attribute>
 
+  <attribute>
+    <id>ATTR_CHIP_EC_FEATURE_MSS_CHECK_DISABLE_HW_VREF_CAL</id>
+    <targetType>TARGET_TYPE_PROC_CHIP</targetType>
+    <description>
+      In below DD2 Nimbus, the HW VREF calibration needs to be checked against the chip subversion to see if it can be run.
+    </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_ODT_CONFIG</id>
     <targetType>TARGET_TYPE_PROC_CHIP</targetType>
@@ -2425,6 +2442,23 @@
     </chipEcFeature>
   </attribute>
 
+  <attribute>
+    <id>ATTR_CHIP_EC_FEATURE_MSS_CHECK_DIABLE_RD_VREF_CAL_VREFSENSE</id>
+    <targetType>TARGET_TYPE_PROC_CHIP</targetType>
+    <description>
+      In below DD2 Nimbus, the RD VREF cal VREF sense needs to be checked against the chip subversion to see if it should be run.
+    </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_RNG_ADAPTEST_SETTINGS</id>
     <targetType>TARGET_TYPE_PROC_CHIP</targetType>