CONFIG_ATARI_SCC is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k
default or selected kernelversion does not have config value CONFIG_ATARI_SCC.
Result is shown for kernelversion 5.4.123

Atari SCC serial support

configname: CONFIG_ATARI_SCC

Linux/68k Kernel Configuration
└─>Character devices
└─>Atari SCC serial support
In linux kernel since version 2.6.12  
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.