spi: dw-mmio: Use devm_platform_ioremap_resource()

Use the new helper that wraps the calls to platform_get_resource()
and devm_ioremap_resource() together.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190710114230.30047-1-andriy.shevchenko@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-dw-mmio.c

@@ -138,7 +138,6 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
 			 struct dw_spi_mmio *dwsmmio);
 	struct dw_spi_mmio *dwsmmio;
 	struct dw_spi *dws;
-	struct resource *mem;
 	int ret;
 	int num_cs;
 
@@ -150,8 +149,7 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
 	dws = &dwsmmio->dws;
 
 	/* Get basic io resource and map it */
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	dws->regs = devm_ioremap_resource(&pdev->dev, mem);
+	dws->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(dws->regs)) {
 		dev_err(&pdev->dev, "SPI region map failed\n");
 		return PTR_ERR(dws->regs);