removed donut PBLOCK from donut_link.xdc, it is no longer necessary with 2016.4, and makes trouble with the latest PSLs
removed donut PBLOCK from donut_link.xdc, it is no longer necessary with 2016.4, and makes trouble with the latest PSLs

Signed-off-by: Thomas Fuchs <15897a30a83827a951186749e444341d3eb9178d@de.ibm.com>

open-power/snap,open-power/snap,open-power/snap,open-power/snap,open-power/snap