spi: dw-pci: apply pci_bar and re-use pci_name

Nevertheless pci_bar is 0 let's explicitly use it when map IO regions. While
here, use pci_name instead of dev_name.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c
index 0ac86a5..e203d8f 100644
--- a/drivers/spi/spi-dw-pci.c
+++ b/drivers/spi/spi-dw-pci.c
@@ -55,7 +55,7 @@
 	/* Get basic io resource and map it */
 	dws->paddr = pci_resource_start(pdev, pci_bar);
 
-	ret = pcim_iomap_regions(pdev, 1, dev_name(&pdev->dev));
+	ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
 	if (ret)
 		return ret;