hwc: Use gpu composition when there is rotation

Mdp3 has a hw issue where it cannot handle rotation and blending,
when roi height or width is not divisible by 16. When roi is not
divisible by 16 mdp3 would read memory that it is beyond the
image. This leads to page faults, which further leads to poor
performance.

Change-Id: I2cd1b77c21c407503399630cdb702b575aa4e64e
1 file changed