mpxyd: add P2P inline support for data size <= 96 bytes

mpxyd: add P2P inline support for data size <= 96 bytes

Improve small message latency for proxy to proxy service
by including data with the proxy work request. Necessary
changes made to preservie order across WR's regardless
of size. Additional logging included. Improves single byte
one-way latency of about 27% on MFO configurations.

Changes made to avoid forwarding 0-byte rdma write to
scif_writeto, remove CPU hand copies, and order.

Changes for numa_node == -1 such that mic0 assumes MSS
and mic1 assumes MXS modes.

Signed-off-by: Arlin Davis <arlin.r.davis@intel.com>
Signed-off-by: Amir Hanania <amir.hanania@intel.com>