mtip32xx: Use pci_enable_msi() instead of pci_enable_msi_range()

Commit "mtip32xx: Use pci_enable_msix_range() instead of
pci_enable_msix()" was unnecessary, since pci_enable_msi()
function is not deprecated and is still preferable for
enabling the single MSI mode. This update reverts usage of
pci_enable_msi() function.

Besides, the changelog for that commit was bogus, since
mtip32xx driver uses MSI interrupt, not MSI-X.

Cc: Jens Axboe <[e-mail]>
Cc: Asai Thambi S P <[e-mail]>
Cc: [e-mail]

Signed-off-by: Jens Axboe <[e-mail]>

drivers/block/mtip32xx/mtip32xx.c

···
 	INIT_WORK(&dd->work[7].work, mtip_workq_sdbf7);
 
 	pci_set_master(pdev);
-	rv = pci_enable_msi_range(pdev, 1, 1);
-	if (rv < 0) {
+	rv = pci_enable_msi(pdev);
+	if (rv) {
 		dev_warn(&pdev->dev,
 			"Unable to enable MSI interrupt.\n");
 		goto msi_initialize_err;