mmc: dw_mmc-pci: enable bus-mastering mode

This patch enables bus-mastering mode for MMC controller to allow IDMAC
transfers.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Seungwon Jeon <tgih.jun@samsung.com>
Tested-by: Prabu Thangamuthu <Prabu.T@synopsys.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/dw_mmc-pci.c

@@ -61,6 +61,8 @@ static int dw_mci_pci_probe(struct pci_dev *pdev,
 
 	host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO];
 
+	pci_set_master(pdev);
+
 	ret = dw_mci_probe(host);
 	if (ret)
 		return ret;