Check if luma wd and ht are multiple of min cb size

Bug: 65483665

Instead of aligning width and height to 8, it is now
checked for being a multiple of min CB size

FPIIM-2426
Change-Id: I99bf60e19d490fd06933aa01fa6a34f47fe58bb4
(cherry picked from commit ccfd1ea5c4cf9cf0a55088506ae5f312663f8792)
1 file changed