It is much more likely that an architecture file will want to directly
include asm header files.  Reduce this WARNING to a CHECK when the
referencing file is in the arch directory.
Signed-off-by: NAndy Whitcroft <apw@shadowen.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>