drm/komeda: Drop local dma_parms

Since commit 9495b7e9 ("driver core: platform: Initialize dma_parms
for platform devices"), struct platform_device already provides a
dma_parms structure, so we can save allocating another one.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: James Qian Wang <james.qian.wang@arm.com>
[replaced DMA_BIT_MASK(32) with U32_MAX]
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8de297b5b916628c77b99068fb5aac1a69eed6f5.1599164796.git.robin.murphy@arm.com

drivers/gpu/drm/arm/display/komeda/komeda_dev.c

@@ -261,8 +261,7 @@ struct komeda_dev *komeda_dev_create(struct device *dev)
 		goto disable_clk;
 	}
 
-	dev->dma_parms = &mdev->dma_parms;
-	dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
+	dma_set_max_seg_size(dev, U32_MAX);
 
 	mdev->iommu = iommu_get_domain_for_dev(mdev->dev);
 	if (!mdev->iommu)

drivers/gpu/drm/arm/display/komeda/komeda_dev.h

@@ -163,8 +163,6 @@ struct komeda_dev {
 	struct device *dev;
 	/** @reg_base: the base address of komeda io space */
 	u32 __iomem   *reg_base;
-	/** @dma_parms: the dma parameters of komeda */
-	struct device_dma_parameters dma_parms;
 
 	/** @chip: the basic chip information */
 	struct komeda_chip_info chip;