remove path cleanups

[Christoph Hellwig]

Hi all,

this series cleans up the remove path in the PCIe driver and a bit in the
common code after fixing a harmless bug in the Apple driver.

Diffstat:
 host/apple.c  |    4 -
 host/core.c   |   65 +++++++++-----------------------
 host/fc.c     |    2 
 host/nvme.h   |    3 -
 host/pci.c    |  117 +++++++++++++++++++++++++---------------------------------
 host/rdma.c   |    5 --
 host/tcp.c    |    5 --
 target/loop.c |    2 
 8 files changed, 77 insertions(+), 126 deletions(-)