ata: sata_dwc_460ex: Propagate platform device ID to DMA driver

Propagate platform device ID to DMA driver to distinguish relationship
between DMA and SATA instances.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

drivers/ata/sata_dwc_460ex.c

@@ -248,6 +248,7 @@ static int sata_dwc_dma_init_old(struct platform_device *pdev,
 		return -ENOMEM;
 
 	hsdev->dma->dev = &pdev->dev;
+	hsdev->dma->id = pdev->id;
 
 	/* Get SATA DMA interrupt number */
 	hsdev->dma->irq = irq_of_parse_and_map(np, 1);