OMAPDSS: rename omap_dss_device's 'device' field to 'dst'

In the old panel device model we had omap_dss_output entities,
representing the encoders in the DSS block. This entity had "device"
field, which pointed to the panel that was using the omap_dss_output.

With the new panel device model, the omap_dss_output is integrated into
omap_dss_device, which now represents a "display entity". Thus the "device"
field, now in omap_dss_device, points to the next entity in the display
entity-chain.

This patch renames the "device" field to "dst", which much better tells
what the field points to.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Archit Taneja <archit@ti.com>
diff --git a/drivers/video/omap2/displays-new/encoder-tpd12s015.c b/drivers/video/omap2/displays-new/encoder-tpd12s015.c
index a3d2991..798ef20 100644
--- a/drivers/video/omap2/displays-new/encoder-tpd12s015.c
+++ b/drivers/video/omap2/displays-new/encoder-tpd12s015.c
@@ -67,7 +67,7 @@
 		return r;
 
 	dst->src = dssdev;
-	dssdev->device = dst;
+	dssdev->dst = dst;
 
 	INIT_COMPLETION(ddata->hpd_completion);
 
@@ -95,15 +95,15 @@
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
 	struct omap_dss_device *in = ddata->in;
 
-	WARN_ON(dst != dssdev->device);
+	WARN_ON(dst != dssdev->dst);
 
-	if (dst != dssdev->device)
+	if (dst != dssdev->dst)
 		return;
 
 	gpio_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);
 
 	dst->src = NULL;
-	dssdev->device = NULL;
+	dssdev->dst = NULL;
 
 	in->ops.hdmi->disconnect(in, &ddata->dssdev);
 }
@@ -372,7 +372,7 @@
 
 	WARN_ON(omapdss_device_is_connected(dssdev));
 	if (omapdss_device_is_connected(dssdev))
-		tpd_disconnect(dssdev, dssdev->device);
+		tpd_disconnect(dssdev, dssdev->dst);
 
 	omap_dss_put_device(in);