msm: mdss: Add mdss rotator OT settings for msm8940

Update rotator OT settings for msm8940. For 1080p 60fps
recommended OT is 8. As MDP rev is same for msm8940 and
msm8937, the setting is done based on AXI OT difference.

Change-Id: I8500110f542654d776be1633f87dc890b4139c50
Signed-off-by: Jayant Shekhar <jshekhar@codeaurora.org>