lpfc: Commonize lpfc_async_xchg_ctx state and flag definitions

The last step of commonization is to remove the 'T' suffix from
state and flag field definitions.  This is minor, but removes the
mental association that it solely applies to nvmet use.

Signed-off-by: Paul Ely <paul.ely@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>