[PATCH] rio cleanups

INKERNEL is always defined
HOST is never defined
therefore RTA is also never defined

Strip the relevant garbage out of the headers on this basis.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>