drm/msm: Fix a7xx TPL1 cluster snapshot

Later gens have both a PIPE_BR and PIPE_NONE section.  The snapshot tool
seems to expect this for x1-85 as well.  I guess this was just a bug in
downstream kgsl, which went unnoticed?

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/666662/