msm: kgsl: Enable Content Protection for A650 GPU

Enable Content Protection feature for A650 GPU. This feature allows
the user to create secure memory and to put the GPU into secure mode.

Change-Id: I7845ccca9ec0d7c7f3d04e34802ebcc62295276b
Signed-off-by: Raghu Ananya Arabolu <rarabolu@codeaurora.org>