spi: Drop duplicate code to set master->dev.parent

It's done by spi_alloc_master().
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-axi-spi-engine.c

@@ -525,7 +525,6 @@ static int spi_engine_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_ref_clk_disable;
 
-	master->dev.parent = &pdev->dev;
 	master->dev.of_node = pdev->dev.of_node;
 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_3WIRE;
 	master->bits_per_word_mask = SPI_BPW_MASK(8);

drivers/spi/spi-dln2.c

@@ -701,7 +701,6 @@ static int dln2_spi_probe(struct platform_device *pdev)
 	}
 
 	dln2->master = master;
-	dln2->master->dev.parent = dev;
 	dln2->master->dev.of_node = dev->of_node;
 	dln2->pdev = pdev;
 	dln2->port = pdata->port;

drivers/spi/spi-pxa2xx.c

@@ -1543,7 +1543,6 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 	drv_data->pdev = pdev;
 	drv_data->ssp = ssp;
 
-	master->dev.parent = &pdev->dev;
 	master->dev.of_node = pdev->dev.of_node;
 	/* the spi->mode bits understood by this driver: */
 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP;