iommu/omap: Use dev_get_platdata()

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/omap-iommu.c

@@ -170,7 +170,7 @@ static int iommu_enable(struct omap_iommu *obj)
 {
 	int err;
 	struct platform_device *pdev = to_platform_device(obj->dev);
-	struct iommu_platform_data *pdata = pdev->dev.platform_data;
+	struct iommu_platform_data *pdata = dev_get_platdata(&pdev->dev);
 
 	if (pdata && pdata->deassert_reset) {
 		err = pdata->deassert_reset(pdev, pdata->reset_name);
@@ -190,7 +190,7 @@ static int iommu_enable(struct omap_iommu *obj)
 static void iommu_disable(struct omap_iommu *obj)
 {
 	struct platform_device *pdev = to_platform_device(obj->dev);
-	struct iommu_platform_data *pdata = pdev->dev.platform_data;
+	struct iommu_platform_data *pdata = dev_get_platdata(&pdev->dev);
 
 	omap2_iommu_disable(obj);
 
@@ -1007,7 +1007,7 @@ static int omap_iommu_probe(struct platform_device *pdev)
 	int irq;
 	struct omap_iommu *obj;
 	struct resource *res;
-	struct iommu_platform_data *pdata = pdev->dev.platform_data;
+	struct iommu_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct device_node *of = pdev->dev.of_node;
 
 	obj = devm_kzalloc(&pdev->dev, sizeof(*obj) + MMU_REG_SIZE, GFP_KERNEL);