disp: msm: increase delay times while waiting to turn off rscc clocks

RSC is timing out while checking for power control register,
increasing wait times only after a poms, removes this issue.

Change-Id: Idf18ae7a6a142a3f004013996a641d8bd7de94ff
Signed-off-by: Yashwanth <yvulapu@codeaurora.org>