Revert PLL unlock commits of 45102 and 46563

Change-Id: I27f7c75d73881a54152a77c7ab2c8b49be19adb7
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/47148
Reviewed-by: Joachim Fenkes <fenkes@de.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+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: Juan R. Medina <jrmedina@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Gregory S. Still <stillgs@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/47161
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>

src/import/chips/p9/procedures/hwp/lib/p9_common_poweronoff.H

@@ -528,17 +528,6 @@ p9_common_poweronoff(
     FAPI_DBG("Assert vital thold via NET_CTRL0[16]");
     FAPI_TRY(putScom(i_target, NET_CTRL0_WOR[l_type], MASK_SET(16)));
 
-    if (l_type == 1)
-    {
-        // upon power off cache, dpll is about to be unlocked
-        // to prevent pcb fir fires, need to mask the bit for the time being
-        // the error will be cleared and unmasked when dpll is locked again
-        FAPI_DBG("Mask DPLL unlock error in FIR via SLAVE_CONFIG[12]");
-        FAPI_TRY(getScom(i_target, EQ_SLAVE_CONFIG_REG, l_data64));
-        l_data64.setBit<12>();
-        FAPI_TRY(putScom(i_target, EQ_SLAVE_CONFIG_REG, l_data64));//
-    }
-
     ///////////////////////////////////////////////////////////////////////////
     // Procedure code
     ///////////////////////////////////////////////////////////////////////////