CONFIG_ATM_FORE200E_MAYBE is not available for the default architecture x86.
Result is shown for architecture sparc64
default or selected kernelversion does not have config value CONFIG_ATM_FORE200E_MAYBE.
Result is shown for kernelversion

FORE Systems 200E-series


Linux Kernel Configuration
└─> Device Drivers
└─> Network device support
└─> ATM drivers
└─> FORE Systems 200E-series

This is a driver for the FORE Systems 200E-series ATM adapter
cards. It simultaneously supports PCA-200E and SBA-200E models
on PCI and SBUS hosts. Say Y (or M to compile as a module
named fore_200e) here if you have one of these ATM adapters.

Note that the driver will actually be compiled only if you
additionally enable the support for PCA-200E and/or SBA-200E

See the file <file:Documentation/networking/fore200e.txt> for
further details.