Have MAP_ICM_page() firmware command map assume pages are always the
HCA-native 4K size rather than using the kernel's page size.  This
will make handling doorbell pages for mem-free mode simpler.
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>