Massimo Dal Zotto stopped maintaining the i8k driver several years ago,
so move his name from MAINTAINERS to CREDITS.

Signed-off-by: Jean Delvare <[email protected]>
Cc: Massimo Dal Zotto <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>