[PATCH] Let CDROM_PKTCDVD_WCACHE depend on EXPERIMENTAL

Unless the help text is outdated, this seems to be logical.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Peter Osterlund <petero2@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>