[PATCH] s390: add #ifdef __KERNEL__ to asm-s390/setup.h

Based on a patch from Maximilian Attems <maks@sternwelten.at> .  Nothing in
asm-s390/setup.h is of interest for user space.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>