NVMe: Fix whitespace damage in nvme_init

Commit 5c42ea16 used spaces instead of tabs.
Also remove the unnecessary initialisation of the 'result' variable.
Signed-off-by: NMatthew Wilcox <matthew.r.wilcox@intel.com>

drivers/block/nvme.c

@@ -1720,7 +1720,7 @@ static struct pci_driver nvme_driver = {
 
 static int __init nvme_init(void)
 {
-	int result = -EBUSY;
+	int result;
 
 	nvme_thread = kthread_run(nvme_kthread, NULL, "nvme");
 	if (IS_ERR(nvme_thread))