Fix SRC BC8A1A20 - RUNTIME::RC_INVALID_RHB_INSTANCE
Fix SRC BC8A1A20 - RUNTIME::RC_INVALID_RHB_INSTANCE

    -When a system with 3 or more nodes has node 0
     deconfigured, the code to calculate the hdat
     instance number is not correct, the instance
     should begin with 0 as the first functional node
     detected, instead the first instance is 1.

Change-Id: Ia5c9fe8f3c78e8b0cc0612aea1199eb70671a729
CQ:SW430818
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/60001
Reviewed-by: Prachi Gupta <25a72946fc4ec2539bba3cff1fbb2916af6a7649@us.ibm.com>
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: Jenkins OP Build CI <e610bd72261d3c0a48f1e8ae36832ab00774d426@us.ibm.com>
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Tested-by: Jenkins OP HW <0eb0fff262f74a65a832afbcc7b153e391c9a3fd@us.ibm.com>
Reviewed-by: William G. Hoffa <7dd6aa5e78423995d9d7c7ecada5b77ee07f88cc@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