Restore ATTR_CEN_SCHMOO_MULTIPLE_SETUP_CALL after shmoos to fix maski…

…ng errors

Change-Id: I3b1cbe4955da147ffa148d37c2126a782d06cafc
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/59725
Reviewed-by: STEPHEN GLANCY <sglancy@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Dev-Ready: Louis Stermole <stermole@us.ibm.com>
Reviewed-by: ANDRE A. MARIN <aamarin@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/59729
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: Daniel M. Crowell <dcrowell@us.ibm.com>

src/import/chips/centaur/procedures/hwp/memory/p9c_mss_draminit_training_advanced.C

@@ -726,6 +726,8 @@ fapi2::ReturnCode wr_vref_shmoo_ddr4(const fapi2::Target<fapi2::TARGET_TYPE_MBA>
                  l_right_margin);
     }
 
+    FAPI_INF("Restoring mcbist setup attribute...");
+    FAPI_TRY(reset_attribute(i_target_mba));
 fapi_try_exit:
     return fapi2::current_err;
 }
@@ -1324,6 +1326,8 @@ fapi2::ReturnCode wr_vref_shmoo_ddr4_bin(const fapi2::Target<fapi2::TARGET_TYPE_
     FAPI_TRY(fapi2::getScom(i_target_mba, CEN_MBA_MBSPAMSKQ, l_data_buffer_64));
     l_data_buffer_64.clearBit<10>();
 
+    FAPI_INF("Restoring mcbist setup attribute...");
+    FAPI_TRY(reset_attribute(i_target_mba));
 //Read the write vref attributes
 fapi_try_exit:
     return fapi2::current_err;