drm/msm: dsi: Return errors whan dt parsing fails
If dt parsing fails, we should return an error instead of pretending everything completed successfully. Cc: Doug Anderson <dianders@chromium.org> Reviewed-by: NAbhinav Kumar <abhinavk@codeaurora.org> Signed-off-by: NSean Paul <seanpaul@chromium.org> Signed-off-by: NRob Clark <robdclark@gmail.com>
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