NVMe: Precedence error in nvme_pr_clear()

The original code is equivalent to:

	u32 cdw10 = (1 | key) ? 1 << 3 : 0;

But we want:

	u32 cdw10 = 1 | (key ? 1 << 3 : 0);

Fixes: 1d277a63: ('NVMe: Add persistent reservation ops')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@fb.com>