Tie up one last loose end by mapping enough context memory to cover
the whole multicast table during initialization, and then enable
mem-free mode.  mthca now supports enough of mem-free mode so that
IPoIB works with a mem-free HCA.
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>