Row repair enabled MRW remove writeable

Change-Id: I8c5272fe194c033316da16feaeafaa8676ff03f7
RTC: 195638
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/63212
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: HWSV CI <hwsv-ci+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Matt Derksen <mderkse1@us.ibm.com>
Reviewed-by: Brian J. Stegmiller <bjs@us.ibm.com>
Reviewed-by: Zane C. Shelley <zshelle@us.ibm.com>
Reviewed-by: Thi N. Tran <thi@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/63248
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Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>

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

@@ -720,8 +720,7 @@
         <valueType>uint8</valueType>
         <enum>SUPPORTED = 1, UNSUPPORTED = 0</enum>
         <platInit/>
-        <default>0</default>
-        <writeable/>
+        <default>UNSUPPORTED</default>
     </attribute>
 
 </attributes>