net: ena: Use pci_sriov_configure_simple() to enable VFs

Instead of implementing our own version of a SR-IOV configuration stub in
the ena driver, use the existing pci_sriov_configure_simple() function.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Greg Rose <gvrose8192@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

drivers/net/ethernet/amazon/ena/ena_netdev.c

@@ -3385,32 +3385,6 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	return rc;
 }
 
-/*****************************************************************************/
-static int ena_sriov_configure(struct pci_dev *dev, int numvfs)
-{
-	int rc;
-
-	if (numvfs > 0) {
-		rc = pci_enable_sriov(dev, numvfs);
-		if (rc != 0) {
-			dev_err(&dev->dev,
-				"pci_enable_sriov failed to enable: %d vfs with the error: %d\n",
-				numvfs, rc);
-			return rc;
-		}
-
-		return numvfs;
-	}
-
-	if (numvfs == 0) {
-		pci_disable_sriov(dev);
-		return 0;
-	}
-
-	return -EINVAL;
-}
-
-/*****************************************************************************/
 /*****************************************************************************/
 
 /* ena_remove - Device Removal Routine
@@ -3526,7 +3500,7 @@ static struct pci_driver ena_pci_driver = {
 	.suspend    = ena_suspend,
 	.resume     = ena_resume,
 #endif
-	.sriov_configure = ena_sriov_configure,
+	.sriov_configure = pci_sriov_configure_simple,
 };
 
 static int __init ena_init(void)