Added callout interface for parts such as PNOR and SBE

Parts supported for callout are PNOR, SBE, VRM, GPIO, etc

Change-Id: I6734d58e8e44a7bfd71e87cc4f910bce9473f86d
RTC: 109945
CMVC-Coreq: 945677
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/13547
Tested-by: Jenkins Server
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>
Reviewed-by: STEPHEN M. CPREK <smcprek@us.ibm.com>
Reviewed-by: Andrew J. Geissler <andrewg@us.ibm.com>
Remove Centaur I2C Master setup from end of IPL

PHYP doesn't use the Centaur engines and Opal will set them up
themselves so HB doesn't need to do this.  The immediate
motivation to remove this is to avoid a potential ibscom
collision between OCC and HB.

Change-Id: I7086e6e5105eb0d40f4727e695e49c5c5d486eb2
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/14932
Tested-by: Jenkins Server
Reviewed-by: Andrew J. Geissler <andrewg@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>