armv6: enable over_n_8888

armv6: enable over_n_8888

Enable the fast path added in the previous patch by moving the lookup
table entries to their proper locations.

Lowlevel-blt-bench benchmark statistics with 30 iterations, showing the
effect of adding this one patch on top of
"armv6: Add over_n_8888 fast path (disabled)", which was applied on
fd595692941f3d9ddea8934462bd1d18aed07c65.

       Before          After
      Mean StdDev     Mean StdDev   Confidence   Change
L1    12.5   0.04     45.2   0.10    100.00%    +263.1%
L2    11.1   0.02     43.2   0.03    100.00%    +289.3%
M      9.4   0.00     42.4   0.02    100.00%    +351.7%
HT     8.5   0.02     25.4   0.10    100.00%    +198.8%
VT     8.4   0.02     22.3   0.07    100.00%    +167.0%
R      8.2   0.02     23.1   0.09    100.00%    +183.6%
RT     5.4   0.05     11.4   0.21    100.00%    +110.3%

At most 3 outliers rejected per test per set.

Iterating here means that lowlevel-blt-bench was executed 30 times, and
the statistics above were computed from the output.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>