target: msm8916: add necessary delay before backlight on

otm8019A video mode panel needs delay between TG and backlight
on, to make sure screen content is updated to IC correctly.
This helps to address some unexpected artifacts during power on.

CRs-fixed: 662657
Change-Id: I487c3b961c1412f8c3ce9d8a171cd08fa6d1bc58
1 file changed