CONFIG_ATARI_SCC is not available for the default architecture x86.
Result is shown for architecture m68k
default or selected kernelversion does not have config value CONFIG_ATARI_SCC.
Result is shown for kernelversion 5.5.18

Atari SCC serial support

configname: CONFIG_ATARI_SCC

Linux/68k Kernel Configuration
└─> Character devices
└─> Atari SCC serial support

If you have serial ports based on a Zilog SCC chip (Modem2, Serial2,
LAN) and like to use them under Linux, say Y. All built-in SCC's are
supported (TT, MegaSTE, Falcon), and also the ST-ESCC. If you have
two connectors for channel A (Serial2 and LAN), they are visible as
two separate devices.

To compile this driver as a module, choose M here.