Expose AFFINITY_PATH attribute to MRW
Expose AFFINITY_PATH attribute to MRW

Per recent design interlocks, AFFINITY_PATH now needs to be exposed to MRW
so that other tools can directly make use of MRW without the Hostboot MRW
parser getting in the way.  Note that Hostboot's MRW parser will still
subvert whatever the MRW sets at this juncture.

Change-Id: I22ef222c0326167d6949c1a6ab5e3f03a29a42c6
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/89739
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: Jenkins OP Build CI <e610bd72261d3c0a48f1e8ae36832ab00774d426@us.ibm.com>
Reviewed-by: Michael Baiocchi <a81f28e8886c5e2bd4bbd867228778c3b7b19dea@us.ibm.com>
Reviewed-by: Zachary Clark <9de8c4480303b5335cd2a33eefe814615ba3612a@ibm.com>
Reviewed-by: Roland Veloz <768fb49134ab823c765de70e7067d9f65f5d0a3e@us.ibm.com>
Reviewed-by: Christian R Geddes <f397583a9caa8163a06ad1128784fb67413f2fe6@us.ibm.com>
Reviewed-by: Daniel M Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>

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