Display: Optimize the delay time when gi display panel screen on

Display: Optimize the delay time when gi display panel screen on

BZ: 29879

There so many delay in gi panel dpi ic init. cause gi Screen wake up
slowly after power key pressed. Optimize the delay time when Screen on.

Change-Id: I5450eb0e6d63815eaa18ed8c5cd079e2c191a603
Signed-off-by: zhang dongming <dongmingx.zhang@intel.com>
Reviewed-on: http://android.intel.com:8080/43333
Reviewed-by: Tong, BoX <box.tong@intel.com>
Tested-by: Tong, BoX <box.tong@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>