msm: msm_fb: set dma pan info when continuous splash is enabled.

Enable vsync_enable flag when continous splash is present. This is
needed to program Tearcheck params for command mode panels.

Change-Id: Ia704b9076628e20a308fbac6f202fa7d20f5f966
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>