media: dvbdev: Use %pe format specifier

The %pe format specifier is designed to print error pointers. It prints
a symbolic error name (eg. -EINVAL) and it makes the code simpler by
omitting PTR_ERR()

This patch fixes this cocci report:
./dvb-core/dvbdev.c:575:48-55: WARNING: Consider using %pe to print PTR_ERR()

Signed-off-by: Ricardo Ribalda <[e-mail]>
Acked-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/dvb-core/dvbdev.c

···
 			       MKDEV(DVB_MAJOR, minor),
 			       dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id);
 	if (IS_ERR(clsdev)) {
-		pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n",
-		       __func__, adap->num, dnames[type], id, PTR_ERR(clsdev));
+		pr_err("%s: failed to create device dvb%d.%s%d (%pe)\n",
+		       __func__, adap->num, dnames[type], id, clsdev);
 		if (new_node) {
 			list_del(&new_node->list_head);
 			kfree(dvbdevfops);