drm/omap: omap_display_timings: Use display_flags for double_pixel mode

In preparation to move the stack to use the generic videmode struct for
display timing information use display_flags for double_pixel mode.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/dss/hdmi4.c

@@ -175,7 +175,7 @@ static int hdmi_power_on_full(struct omap_dss_device *dssdev)
 	       p->vactive);
 
 	pc = p->pixelclock;
-	if (p->double_pixel)
+	if (p->flags & DISPLAY_FLAGS_DOUBLECLK)
 		pc *= 2;
 
 	/* DSS_HDMI_TCLK is bitclk / 10 */