COMPMID-511: Port FixedPoint arithmetic to new validation

Change-Id: Iae85c195a4ecdaf6df1d0055f3ad09582d128dc1
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/88669
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
22 files changed