The nvme CRC64 generator expects the caller to pass inverted seed value.
Pass inverted crc value for metadata buffer.

Cc: qemu-stable@nongnu.org
Fixes: 44219b60 ("hw/nvme: 64-bit pi support")
Signed-off-by: Ankit Kumar <ankit.kumar@samsung.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>