MDP: correct clock calculation logic for up-scaling scenario Part of yscale calculation logic in mdp4_calc_req_mdp_clk function is only applicable for downscale scenarios. The incorrect clock calculation was unnecessarily creating blt mode requirement even for upscale scenarios.

Change-Id: I036be2ceb2f59fb159885b2d15b208706808198b
Signed-off-by: Nirmal Abraham <nabrah@codeaurora.org>
msm: mdp: Unmap secure memory on dtv off

Signed-off-by: naseer <naseer@codeaurora.org>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>