nvme: precedence bug in nvme_pr_clear()

nvme: precedence bug in nvme_pr_clear()

BugLink: http://bugs.launchpad.net/bugs/1531539
The "|" operator has higher precedence than "?:" so this didn't work as
intended.  I had previously fixed this bug, but it we copied the older
unfixed version when we moved the function between files.

Fixes: 1673f1f08c88 ('nvme: move block_device_operations and ns/ctrl freeing to common code')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit 8c0b39155048d5a24f25c6c60aa83729927b04cd)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>