MLCE-1381: Fixing NPU PMU issue

Moving to the latest NPU driver version. This contains fix for Arm
Ethos-U85 NPU's PMU.

Minor fixes also included for displaying of these counters for the
latest Arm Corstone-320 FVP.

Change-Id: I281866b407cc133898cca97ad3b775931c367e82
Signed-off-by: Kshitij Sisodia <kshitij.sisodia@arm.com>