add new ring mode for fastarray
add new ring mode for fastarray

Change-Id: I1ccbf139ed71df69eba06fa9a3e03804482aabd6
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/22237
Tested-by: Jenkins Server
Tested-by: Hostboot CI
Tested-by: PPE CI
Reviewed-by: Richard J. Knight <94c04f3910596886be97211d492ad29f0ba29cd5@us.ibm.com>
Reviewed-by: Johannes Koesters <c1e4f097cc3c681e0c5c6cab084e001a90b487ca@de.ibm.com>

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