CONFIG_BANK_0 is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_BANK_0.
Result is shown for kernelversion 6.7-rc3

Bank 0 (AMBCTL0.L)

configname: CONFIG_BANK_0

Linux Kernel Configuration
└─>Blackfin Processor Options
└─>EBIU_AMBCTL Control
└─>Bank 0 (AMBCTL0.L)
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
These are the low 16 bits of the EBIU_AMBCTL0 MMR which are
used to control the Asynchronous Memory Bank 0 settings.

depends
NOT CONFIG_BF60x