cyclades, cy_readX/writeX cleanup

- cy_readX are placeholders for readX, remove it
- move cy_writeX macros into do {} while(0) to be safe
Signed-off-by: NJiri Slaby <jirislaby@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>