enable spreading via SS PLL for Fleetwood platform

pervasive_attribues.xml:
  Create new platinit attribute -- ATTR_MRW_FILTER_PLL_BUCKET
  System specific value for Filter PLL bucket selector (init=0), set by MRW
  - if non-zero, this value will directly set ATTR_FILTER_PLL_BUCKET,
    which is used by SBE to select the override to apply
  - if zero, MVPD MK keyword will set ATTR_FILTER_PLL_BUCKET

p9.filter.pll.override.scan.initfile:
  Repurpose overrides built for Cumulus, to produce 0.2% down spread
  Nimbus overrides still enable control of BGoffset

p9_xip_customize.C:
  Consume ATTR_MRW_FILTER_PLL_BUCKET and use logic above to
  set ATTR_FILTER_PLL_BUCKET

Change-Id: I2ea799179632d36251027a1d4468c6c89bfa6e00
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/57988
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: HWSV CI <hwsv-ci+hostboot@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: Thi N. Tran <thi@us.ibm.com>
Reviewed-by: Joachim Fenkes <fenkes@de.ibm.com>
Reviewed-by: Joseph J. McGill <jmcgill@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/58003
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>

src/import/chips/p9/procedures/hwp/perv/p9_sbe_npll_initf.C

@@ -5,7 +5,7 @@
 /*                                                                        */
 /* OpenPOWER sbe Project                                                  */
 /*                                                                        */
-/* Contributors Listed Below - COPYRIGHT 2015,2017                        */
+/* Contributors Listed Below - COPYRIGHT 2015,2018                        */
 /* [+] International Business Machines Corp.                              */
 /*                                                                        */
 /*                                                                        */
@@ -128,8 +128,7 @@ fapi2::ReturnCode p9_sbe_npll_initf(
                             "Unsupported Filter PLL bucket value!");
         }
 
-        // re-scan PLL ring to apply overlay containing filter PLL BGoffset
-        // selected from MVPD
+        // re-scan PLL ring to apply selected filter PLL overlay
         FAPI_DBG("Re-scan perv_pll_bndy to apply perv_pll_bndy_flt_%d ring",
                  l_fpll_bucket);
         FAPI_TRY(fapi2::putRing(i_target_chip,

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

@@ -7449,4 +7449,21 @@
     </chipEcFeature>
   </attribute>
   <!-- ******************************************************************** -->
+  <attribute>
+    <id>ATTR_CHIP_EC_FEATURE_SS_FPLL_SPREAD</id>
+    <targetType>TARGET_TYPE_PROC_CHIP</targetType>
+    <description>
+     Generate 0.2% down spread in SS Filter PLL
+    </description>
+    <chipEcFeature>
+      <chip>
+        <name>ENUM_ATTR_NAME_CUMULUS</name>
+        <ec>
+          <value>0x10</value>
+          <test>GREATER_THAN_OR_EQUAL</test>
+        </ec>
+      </chip>
+    </chipEcFeature>
+  </attribute>
+  <!-- ******************************************************************** -->
 </attributes>

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

@@ -143,13 +143,27 @@
 <attribute>
   <id>ATTR_FILTER_PLL_BUCKET</id>
   <targetType>TARGET_TYPE_PROC_CHIP</targetType>
-  <description>Select Filter PLL BGoffset programming</description>
+  <description>Select Filter PLL bucket</description>
   <valueType>uint8</valueType>
   <persistRuntime/>
   <writeable/>
   <initToZero/>
 </attribute>
 
+<attribute>
+  <id>ATTR_MRW_FILTER_PLL_BUCKET</id>
+  <targetType>TARGET_TYPE_SYSTEM</targetType>
+  <description>
+    System specific value for Filter PLL bucket, provided by MRW.
+    If non-zero, this value will directly set ATTR_FILTER_PLL_BUCKET (used by SBE to select bucket).
+    If zero, VPD MK content will set ATTR_FILTER_PLL_BUCKET.
+  </description>
+  <valueType>uint8</valueType>
+  <persistRuntime/>
+  <platInit/>
+  <initToZero/>
+</attribute>
+
 <attribute>
   <id>ATTR_OB0_PLL_BUCKET</id>
   <targetType>TARGET_TYPE_PROC_CHIP</targetType>