nvme-pci: properly print controller address

Align PCI address print with fabrics address that is printed with
newline character.

Before:
[root@server40 linux]# cat /sys/class/nvme/nvme2/address
0000:0b:00.0[root@server40 linux]#

After:
[root@server40 linux]# cat /sys/class/nvme/nvme2/address
0000:0b:00.0
[root@server40 linux]#

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>