drm/msm/sde: update rsc TCS execution wait time

This change increases the TCS execution wait time to take
care of worst case latency based on profiling results.

Change-Id: I1484f5f8a3dd702070520e05f765c059d8968cd2
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>