ARM: dts: Prevent L2 PC from occurring when Venus is active on 8996

The occurrance of L2 power collapse actually increases power when Venus
is active.  As set "qcom,pm-qos-latency-us" higher than the normal
cluster latencies to prevent the power collapse from occurring.

Change-Id: I86761f686a5eafe654a7b563656d51d25e3844a7
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>