drm/omap: omap_display_timings: rename y_res to vactive

In preparation to move the stack to use the generic videmode struct for
display timing information rename the y_res member to vactive.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c b/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c
index ef5ae08..33bc41c 100644
--- a/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c
+++ b/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c
@@ -23,7 +23,7 @@
 
 static const struct omap_video_timings hdmic_default_timings = {
 	.hactive	= 640,
-	.y_res		= 480,
+	.vactive	= 480,
 	.pixelclock	= 25175000,
 	.hsw		= 96,
 	.hfp		= 16,