spi: spi-fsl-lpspi: downgrade log level for pio mode

Having no DMA is not an error. The simplest reason is not having it
configured. SPI will still be usable, so raise a warning instead to
get still some attention.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20230531072850.739021-1-alexander.stein@ew.tq-group.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: tq-steina

drivers/spi/spi-fsl-lpspi.c

@@ -917,7 +917,7 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
 	if (ret == -EPROBE_DEFER)
 		goto out_pm_get;
 	if (ret < 0)
-		dev_err(&pdev->dev, "dma setup error %d, use pio\n", ret);
+		dev_warn(&pdev->dev, "dma setup error %d, use pio\n", ret);
 	else
 		/*
 		 * disable LPSPI module IRQ when enable DMA mode successfully,