Improve mpipl workaround setting WAKEUP_SELECT bit
Improve mpipl workaround setting WAKEUP_SELECT bit

Previously the workaround was depending on the master core being
first in the list of returned targets. This is usually what happens
but technically we cannot rely on that.

Change-Id: I291bbcc406afaa1d0f40c7a65a93d2b47993c072
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/39093
Reviewed-by: Martin Gloff <df0a4963746ae04ab678d064fccc7ee68adfd751@us.ibm.com>
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Reviewed-by: Richard J. Knight <94c04f3910596886be97211d492ad29f0ba29cd5@us.ibm.com>
Tested-by: Jenkins OP Build CI <e610bd72261d3c0a48f1e8ae36832ab00774d426@us.ibm.com>
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>

Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot