msm: mdss: Disable smart blit optimization for BG layer

BG layer with scaling, rotation and up down flip is not supported.
To fix the garbled screen with green lines for front camera use case,
disable the smart blit optimization for YUV layers with above properties.

Change-Id: I134d0b535cae56bbee680f68f681e5edd55ea1b5
Signed-off-by: Arun kumar <akanak@codeaurora.org>