use the core tagset alloc/free helpers in nvme-pci

[Christoph Hellwig]

Hi all,

this series switches over nvme-pci to use the common tagset alloc/free
helpers.

Diffstat:
 host/core.c   |   25 +++++++++++-----
 host/fc.c     |    4 +-
 host/nvme.h   |    7 ++--
 host/pci.c    |   89 +++++++++++-----------------------------------------------
 host/rdma.c   |    5 +--
 host/tcp.c    |    4 +-
 target/loop.c |    4 +-
 7 files changed, 48 insertions(+), 90 deletions(-)