pcmcia: remove PCCARD_IODYN

The config PCCARD_IODYN was last used in the config option PCMCIA_M8XX with
its m8xx_pcmcia driver. This driver was removed with commit 39eb56da
("pcmcia: Remove m8xx_pcmcia driver"), included in v3.17, back in 2014.
Since then, the config PCCARD_IODYN is unused. Remove the config option,
the corresponding file included with this config and the corresponding
definition in the pcmcia header file.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>