Enable hcode_image_build HWPs in istep 15.1
Enable hcode_image_build HWPs in istep 15.1

Note that this requires a back build of b0323b_1614.910 or greater
to get the new hw image

Change-Id: Ic7b1f2b9c9baa4416d8c2c264be2878b30c610de
RTC: 133832
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/22479
Tested-by: Jenkins Server
Reviewed-by: Andrew J. Geissler <c46de238cd554860f0bd4010b1729f1323facd9c@us.ibm.com>
Tested-by: FSP CI Jenkins
Reviewed-by: Matt Derksen <dfaaf609b81bd1529ae3a1d95ea4eeed3f78c848@us.ibm.com>
Reviewed-by: Martin Gloff <df0a4963746ae04ab678d064fccc7ee68adfd751@us.ibm.com>
Reviewed-by: Matthew A. Ploetz <9c4e62337697f225e3360ddd1441dbba069477f9@us.ibm.com>

open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot