drm/bridge: ti-sn65dsi86: use dev name for debugfs

This should be more future-proof if we ever encounter a device with two
of these bridges.
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190706203105.7810-1-robdclark@gmail.com

drivers/gpu/drm/bridge/ti-sn65dsi86.c

@@ -182,7 +182,7 @@ DEFINE_SHOW_ATTRIBUTE(status);
 
 static void ti_sn_debugfs_init(struct ti_sn_bridge *pdata)
 {
-	pdata->debugfs = debugfs_create_dir("ti_sn65dsi86", NULL);
+	pdata->debugfs = debugfs_create_dir(dev_name(pdata->dev), NULL);
 
 	debugfs_create_file("status", 0600, pdata->debugfs, pdata,
 			&status_fops);