STOP: Fix Stop1 Window conditions

Key_Cronus_Test=PM_REGRESS

Change-Id: I59429f5ac7282378ae5550b3c09e319a51208cdc
CQ: SW435666
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/62656
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Cronus HW CI <cronushw-ci+hostboot@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>

import/chips/p9/procedures/ppe_closed/cme/stop_cme/p9_cme_stop_entry.c

@@ -376,7 +376,7 @@ p9_cme_stop_entry()
                     if (G_cme_stop_record.req_level[core_index] == STOP_LEVEL_1)
                     {
                         G_cme_stop_record.act_level[core_index] = STOP_LEVEL_1;
-                        core_stop1 |= core_mask;
+                        core &= ~core_mask;
                     }
 
                     if ((pCmeImgHdr->g_cme_mode_flags & CME_STOP_11_TO_8_BIT_POS) &&