Disable NX targeting again
Disable NX targeting again

Enabling NX is causing a crash in PHYP, disabling for now
to get the CI runs to work again.

Change-Id: I495e1ff915858cece518a7e6b3a1b3a71cce1db8
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/22134
Tested-by: Jenkins Server
Tested-by: FSP CI Jenkins
Reviewed-by: Stephen M. Cprek <449c81c8ca240ee26e6e5e8e94a7cb83f7b02ee8@us.ibm.com>
Reviewed-by: Matthew A. Ploetz <9c4e62337697f225e3360ddd1441dbba069477f9@us.ibm.com>
Reviewed-by: Christian R. Geddes <f397583a9caa8163a06ad1128784fb67413f2fe6@us.ibm.com>
Reviewed-by: William G. Hoffa <7dd6aa5e78423995d9d7c7ecada5b77ee07f88cc@us.ibm.com>

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