CONFIG_CF_AREA5 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh
default or selected kernelversion does not have config value CONFIG_CF_AREA5.
Result is shown for kernelversion 5.4.123

Area5

configname: CONFIG_CF_AREA5

Compact Flash Connection Area
└─>Area5
In linux kernel since version 2.6.12  
If your board has "Directly Connected" CompactFlash, You should
select the area where your CF is connected to.

- "Area5" if CompactFlash is connected to Area 5 (0x14000000)
- "Area6" if it is connected to Area 6 (0x18000000)

"Area6" will work for most boards. For ADX, select "Area5".