OMAPDSS: DPI displays: Take care of panel timings in the driver itself

The timings maintained in omap_dss_device(dssdev->panel.timings) should be
maintained by the panel driver itself. It's the panel drivers responsibility
to update it if a new set of timings is to be configured. The DPI interface
driver shouldn't be responsible of updating the panel timings, it's responsible
of maintianing it's own copy of timings.

Signed-off-by: Archit Taneja <archit@ti.com>
diff --git a/drivers/video/omap2/displays/panel-generic-dpi.c b/drivers/video/omap2/displays/panel-generic-dpi.c
index 8d4e102..a07e18c 100644
--- a/drivers/video/omap2/displays/panel-generic-dpi.c
+++ b/drivers/video/omap2/displays/panel-generic-dpi.c
@@ -730,6 +730,8 @@
 
 	omapdss_dpi_set_timings(dssdev, timings);
 
+	dssdev->panel.timings = *timings;
+
 	mutex_unlock(&drv_data->lock);
 }