acc: Fix ACC rotate barring highest ACCs too quickly during wraparound

Expected steps (size=4):
6 7 8 9 -> 0 7 8 9 -> 0 1 8 9 -> 0 1 2 9 -> 0 1 2 3 -> 1 2 3 4 -> ...

Befre this patch, for size>2 we got:
6 7 8 9 -> 0 6 7 8 -> 0 1 6 7 -> 0 1 2 6 -> 0 1 2 3 -> 1 2 3 4 -> ...

Which means highest ACCs were barred during more time than others.

Change-Id: I03c298ecb29c4fc5f4c361773f2666588e423ffe
2 files changed