staging: comedi: addi_apci_1500: remove eeprom support

As indicated in the boardinfo, the hardware does not have an eeprom. Remove
the subdevice and support code for it.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>