spi: spi-meson-spifc: 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>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20190904135918.25352-17-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-meson-spifc.c

@@ -286,7 +286,6 @@ static int meson_spifc_probe(struct platform_device *pdev)
 {
 	struct spi_master *master;
 	struct meson_spifc *spifc;
-	struct resource *res;
 	void __iomem *base;
 	unsigned int rate;
 	int ret = 0;
@@ -300,8 +299,7 @@ static int meson_spifc_probe(struct platform_device *pdev)
 	spifc = spi_master_get_devdata(master);
 	spifc->dev = &pdev->dev;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(spifc->dev, res);
+	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base)) {
 		ret = PTR_ERR(base);
 		goto out_err;