p9_xip_customize L1 checkin w/backwards support for Seeprom MB settings.
p9_xip_customize L1 checkin w/backwards support for Seeprom MB settings.

Change-Id: I0a70ced101cf57bd469bd960ebeb15a75b2f939b
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/27406
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: Hostboot CI <52521565bd8ea18a2b112942dce4f4220a97c2c8@us.ibm.com>
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>
Reviewed-by: Prem Shanker Jha <3a412e33a2e075117b5262bcf2504c145441bf2a@in.ibm.com>
Reviewed-by: Martin Peschke <4c516a35580133f593dfe866810ac6bfbd5b0dba@de.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/27407
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>

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