RDMA queue

 * Another Clang compilation fix
 * Collect pvrdma debugging statistics
 * Various fixes for the pvrdma device

# gpg: Signature made Sat 16 Mar 2019 14:09:02 GMT
# gpg:                using RSA key 36D4C0F0CF2FE46D
# gpg: Good signature from "Marcel Apfelbaum <marcel.apfelbaum@zoho.com>" [marginal]
# gpg:                 aka "Marcel Apfelbaum <marcel@redhat.com>" [marginal]
# gpg:                 aka "Marcel Apfelbaum <marcel.apfelbaum@gmail.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: B1C6 3A57 F92E 08F2 640F  31F5 36D4 C0F0 CF2F E46D

* remotes/marcel/tags/rdma-pull-request:
  hw/rdma: Fix the error prints in create_qp_rings()
  hw/pvrdma: Fix zero-initialization of resp in {query/modify}_qp
  hw/rdma: Use {} instead of {0}
  hw/rdma: Remove unused parameter from rdma_poll_cq()
  hw/rdma: Fix broken paths to docs/devel/tracing.txt
  hw/rdma: another clang compilation fix
  hw/pvrdma: Provide correct value to object_get_typename
  hw/pvrdma: Unregister from shutdown notifier when device goes down
  hw/pvrdma: Delete pvrdma_exit function
  hw/pvrdma: Delete unneeded function argument
  hw/rdma: Free all receive buffers when QP is destroyed
  hw/rdma: Free all MAD receive buffers when device is closed
  {hmp, hw/pvrdma}: Expose device internals via monitor interface
  hw/pvrdma: Collect debugging statistics
  hw/rdma: Protect against concurrent execution of poll_cq
  hw/rdma: Introduce protected qlist
  hw/rdma: Switch to generic error reporting way
  contrib/rdmacm-mux: Fix out-of-bounds risk

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>