ide: doc: remove compilation options section from ide-cd documentation

This section pointed out to compilation options which no longer exist.

VERBOSE_IDE_CD_ERRORS has been replace by config option
CONFIG_BLK_DEV_IDECD_VERBOSE_ERRORS.

STANDARD_ATAPI is no longer needed, since the non-standard drivers, which
required bcd2bin are now detected, and there's a flag for them.

NO_DOOR_LOCKING is now a sysctl parameter for cdrom drivers.

CDROM_NBLOCKS_BUFFER is not used anymore. The READAUDIO is now in cdrom.c and it
allocates as much as user space has requested to read, backing off if it fails.

TEST is not there anymore or in cdrom either. ide allows to send ATA commands
through ioctl, although it may be helpful to send MMC packets through the cdrom
layer directly.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>