spi: coldfire-qspi: use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190904135918.25352-12-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-coldfire-qspi.c

@@ -339,7 +339,6 @@ static int mcfqspi_probe(struct platform_device *pdev)
 {
 	struct spi_master *master;
 	struct mcfqspi *mcfqspi;
-	struct resource *res;
 	struct mcfqspi_platform_data *pdata;
 	int status;
 
@@ -362,8 +361,7 @@ static int mcfqspi_probe(struct platform_device *pdev)
 
 	mcfqspi = spi_master_get_devdata(master);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	mcfqspi->iobase = devm_ioremap_resource(&pdev->dev, res);
+	mcfqspi->iobase = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(mcfqspi->iobase)) {
 		status = PTR_ERR(mcfqspi->iobase);
 		goto fail0;