cdrom: Add missing MODULE_DESCRIPTION()

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/cdrom/cdrom.o

Add the missing MODULE_DESCRIPTION() macro invocation.

Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/lkml/20240530-cdrom-v1-1-51579c5c240a@quicinc.com
Reviewed-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/lkml/ZluYQbvrJkRlhnJC@KernelVM
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20240601221816.136977-2-phil@philpotter.co.uk
Signed-off-by: Jens Axboe <axboe@kernel.dk>