Enable postRA spill cleanup

Enable postRA spill cleanup pass

Author: pratikashar

visa/include/VISAOptionsDefs.h

@@ -391,7 +391,7 @@ DEF_VISA_OPTION(vISA_DelayLocalDeclareSplitInGlobalRA, ET_BOOL, "-delayLocalSpli
 DEF_VISA_OPTION(vISA_DisableSpillCoalescing, ET_BOOL, "-nospillcleanup", UNUSED,
                 false)
 DEF_VISA_OPTION(vISA_GRFPostRASpillCodeCleanup, ET_BOOL_TRUE, "-postRAspillCleanup",
-                UNUSED, false)
+                UNUSED, true)
 DEF_VISA_OPTION(vISA_GlobalSendVarSplit, ET_BOOL, "-globalSendVarSplit", UNUSED,
                 false)
 DEF_VISA_OPTION(vISA_NoRemat, ET_BOOL, "-noremat", UNUSED, false)