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

Power button bit on port G

configname: CONFIG_ETRAX_POWERBUTTON_BIT

Linux Kernel Configuration
└─>CRIS v10 options
└─>Power button bit on port G
In linux kernel since version 2.6.12  
Configure where power button is connected.