Added the ability to read and write to SPD, MVPD and PVPD
Added the ability to read and write to SPD, MVPD and PVPD

Change-Id: I7917ea53166f8510313cf29cea1611dc1e2240e7
RTC:176756
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/44024
Reviewed-by: Martin Gloff <df0a4963746ae04ab678d064fccc7ee68adfd751@us.ibm.com>
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@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