nvme: fix endianness of command word prints in nvme_log_err_passthru()

The command word members of struct nvme_common_command are __le32 type,
so use helper le32_to_cpu() to read them properly.

Fixes: 9f079dda ("nvme: allow passthru cmd error logging")
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Alan Adamson <alan.adamson@oracle.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>