OMAPDSS: DISPC: Configure newly added omap_video_timing fields

Hsync, Vsync, Data enable enable logic levels and latching info of Data lanes,
Hsync and Vsync signals(with respect to pixel clock) are newly added parameters
in omap_video_timings.

Program these in dispc_mgr_set_lcd_timings. These will be configured when the
manager's timings are set via dss_mgr_set_timings().

Signed-off-by: Archit Taneja <archit@ti.com>