nvme-pci: remove single trailing whitespace

There is a single trailing whitespace in pci.c.
Since this is just a single whitespace, the chances of this affecting
backports to stable should be quite low, so let's just remove it.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/host/pci.c

@@ -2172,7 +2172,7 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
 
 	if (nr_io_queues == 0)
 		return 0;
-	
+
 	clear_bit(NVMEQ_ENABLED, &adminq->flags);
 
 	if (dev->cmb_use_sqes) {