[PATCH] IB/mthca: update receive queue initialization for new HCAs

Update initialization of receive queue to match new documentation.  This
change is required to support new MT25204 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>