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 <[e-mail]>
Acked-by: Seungwon Jeon <[e-mail]>
Tested-by: Prabu Thangamuthu <[e-mail]>
Signed-off-by: Chris Ball <[e-mail]>

drivers/mmc/host/dw_mmc-pci.c

···
 
 	host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO];
 
+	pci_set_master(pdev);
+
 	ret = dw_mci_probe(host);
 	if (ret)
 		return ret;