ssa.c: In ssa_downstream_handler, allocate pollfd structures dynamically

rather than on stack. This is better as it saves allocating
8K (on 64 bit machines) or 4K (32 bit machines) on stack
which is a large stack frame.

Signed-off-by: Hal Rosenstock <hal@mellanox.com>
ssa.c: Minor optimization for ACM

No downstream connections so no need to check fd_to_conn array

Signed-off-by: Hal Rosenstock <hal@mellanox.com>
plugin: add SMDB preloading

SMDB is preloaded from a directory on disk,
on ssa devices opening.
It is being sent via rsockets and dumped
in Access Layer to 'RDMA_DIR_PATH + /smdb_dump'

Signed-off-by: Ilya Nelkenbaum <ilyan@mellanox.com>
Signed-off-by: Hal Rosenstock <hal@mellanox.com>
ssa.c: Conditionalize newly added smdb static on CORE_INTEGRATION

src/ssa.c:78: warning: #smdb# defined but not used

Signed-off-by: Hal Rosenstock <hal@mellanox.com>