nvme-fc: fold t fc_update_appid into fc_appid_store

No need for this wrapper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220420042723.1010598-4-hch@lst.de


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