msm: mdss: disable auto refresh before configuring tearcheck

If auto refresh mode is enabled in LK, then it needs be disabled
when kernel loads. Otherwise it might cause display corruption,
when in kernel display again configures tearcheck block.

Change-Id: I0b4dddee25e39cea4f32b8afd537993ad64ea812
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>