media: v4l2-common: v4l2_spi_subdev_init : generate unique name

While v4l2_i2c_subdev_init does give a unique name to the subdev, matching
the one appearing in dmesg for messages generated by dev_info and friends
(e.g. imx185 30-0010), v4l2_spi_subdev_init does a poor job, copying only
the driver name, but not the dev_name(), yielding e.g. "imx185", but
missing the "spi1.1" part, and not generating a unique name.

Fix that.

Signed-off-by: Philippe De Muyter <[e-mail]>
Acked-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/v4l2-core/v4l2-common.c

···
 	v4l2_set_subdevdata(sd, spi);
 	spi_set_drvdata(spi, sd);
 	/* initialize name */
-	strscpy(sd->name, spi->dev.driver->name, sizeof(sd->name));
+	snprintf(sd->name, sizeof(sd->name), "%s %s",
+		spi->dev.driver->name, dev_name(&spi->dev));
 }
 EXPORT_SYMBOL_GPL(v4l2_spi_subdev_init);