msm: mdss: revert yuv read fudge factor

Avoid the fudge factor for yuv inputs to Blit engine.
This avoids power regressions on lower resolution panels.

Change-Id: I3b4e3047626a5b51b677457c2a506fddb9c9838f
Signed-off-by: Ramakant Singh <ramaka@codeaurora.org>