ssa.c: A couple of cosmetic formatting changes

Signed-off-by: Hal Rosenstock <hal@mellanox.com>
ssa.c: Clean events and revents for closing upstream connection

In response to IBV_EVENT_CLIENT_REREGISTER event, upstream
closes the upstream connection, but doesn't clean event and
revent. After SM handover, it could crash an application.

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