dmaengine: dw-edma: Remove unused irq field in struct dw_edma_chip

The "irq" field of struct dw_edma_chip was never used. Remove it.

Link: https://lore.kernel.org/r/20220524152159.2370739-2-Frank.Li@nxp.comTested-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-By: Vinod Koul <vkoul@kernel.org>

drivers/dma/dw-edma/dw-edma-pcie.c

@@ -214,7 +214,6 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	chip->dw = dw;
 	chip->dev = dev;
 	chip->id = pdev->devfn;
-	chip->irq = pdev->irq;
 
 	dw->mf = vsec_data.mf;
 	dw->nr_irqs = nr_irqs;

include/linux/dma/edma.h

@@ -18,13 +18,11 @@ struct dw_edma;
  * struct dw_edma_chip - representation of DesignWare eDMA controller hardware
  * @dev:		 struct device of the eDMA controller
  * @id:			 instance ID
- * @irq:		 irq line
  * @dw:			 struct dw_edma that is filed by dw_edma_probe()
  */
 struct dw_edma_chip {
 	struct device		*dev;
 	int			id;
-	int			irq;
 	struct dw_edma		*dw;
 };