ARM: dts: msm: correct video codec MMU non-secure CB on msm8996

Add the proper non-secure CB configuration required for video
codec MMU on msm8996.

Change-Id: I4952e31d1154a7043b871a54be2d29a7a709e45f
Signed-off-by: Bo Fang <bofang1@codeaurora.org>