msm: mdss: wait for hs clk recovery to finish

There are instances where the hs clock lane recovery takes
more time than usual. Poll for some extra time before bailing
out.

CRs-Fixed: 865047
Change-Id: I24ddcf561096e808c0f62def141ed7691cdfa11e
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>