disp: msm: increase rsc min_threshold time

Increase the rsc min_threshold time, so that it has
sufficient time to complete the sequencer in rare
cases. Increase the polling time for tcs ok
from 1us to 3us to align with the min_threshold.

Change-Id: I606f542fba319ec9373b5ff25fa1ab2ca9e1501d
Signed-off-by: Mahadevan <mahap@codeaurora.org>