drm/msm: set sde rsc min threshold time

This change sets rsc min threshold time to 0. Currently
the value is being set to 1 which results in failure to
enter mode 2 in video mode.

Change-Id: I3374fbe41fe2b71d3d6676281216941c83977744
Signed-off-by: Samantha Tran <samtran@codeaurora.org>
Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>