[PATCH] s390: compile fix: missing defines in asm-s390/io.h

Compile fix: add missing __raw_read* and __raw_write* defines to
include/asm-s390/io.h.
These are mandatory since patch c27a0d75
was merged.

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>