CONFIG_ROMFS_FROM_ROM is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k
default or selected kernelversion does not have config value CONFIG_ROMFS_FROM_ROM.
Result is shown for kernelversion 6.2.5

ROMFS image not RAM resident

configname: CONFIG_ROMFS_FROM_ROM

Linux Kernel Configuration
└─>ROMFS image not RAM resident
In linux kernel since version 2.6.12  
The ROMfs filesystem will stay resident in the FLASH/ROM, not be
moved into RAM.