spi/spi_imx: add device information by switching pr_debug() to dev_dbg()

Useful when debugging multiple spi channels.
Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

drivers/spi/spi_imx.c

@@ -469,7 +469,7 @@ static int spi_imx_setup(struct spi_device *spi)
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	int gpio = spi_imx->chipselect[spi->chip_select];
 
-	pr_debug("%s: mode %d, %u bpw, %d hz\n", __func__,
+	dev_dbg(&spi->dev, "%s: mode %d, %u bpw, %d hz\n", __func__,
 		 spi->mode, spi->bits_per_word, spi->max_speed_hz);
 
 	if (gpio >= 0)