Ben Hutchings noticed that MAINTAINERS somehow still contain old
ide-{floppy,tape} entries.  Fix it by moving them to CREDITS (kudos
to Gadi and Paul for all the early hard work on ide-{floppy,tape}).

v2:
Rename IDE/ATAPI CDROM DRIVER entry to IDE/ATAPI DRIVERS one.

Cc: Gadi Oxman <[email protected]>
Cc: Paul Bristow <[email protected]>
Acked-by: Borislav Petkov <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>