drm/i915/perf: fix gen7_append_oa_reports comment

If I'm going to complain about a back-to-front convention then the least
I can do is not muddle the comment up too.

Signed-off-by: Robert Bragg <robert@sixbynine.org>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511154345.962-2-lionel.g.landwerlin@intel.com


Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>