media: exynos4-is: Make use of the helper function devm_platform_ioremap_resource()

Use the devm_platform_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource()
separately
Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/exynos4-is/mipi-csis.c

@@ -766,7 +766,6 @@ static int s5pcsis_probe(struct platform_device *pdev)
 	const struct of_device_id *of_id;
 	const struct csis_drvdata *drv_data;
 	struct device *dev = &pdev->dev;
-	struct resource *mem_res;
 	struct csis_state *state;
 	int ret = -ENOMEM;
 	int i;
@@ -800,8 +799,7 @@ static int s5pcsis_probe(struct platform_device *pdev)
 	if (IS_ERR(state->phy))
 		return PTR_ERR(state->phy);
 
-	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	state->regs = devm_ioremap_resource(dev, mem_res);
+	state->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(state->regs))
 		return PTR_ERR(state->regs);