nvme-fc: don't support the appid attribute without CONFIG_BLK_CGROUP_FC_APPID

nvme-fc appid support needs CONFIG_BLK_CGROUP_FC_APPID to work, so disable
the whole code if the option is not set.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220420042723.1010598-3-hch@lst.de


Signed-off-by: Jens Axboe <axboe@kernel.dk>