default or selected kernelversion does not have config value CONFIG_BNX2X_GENEVE.
Result is shown for kernelversion 5.4.33

Generic Network Virtualization Encapsulation (GENEVE) support

configname: CONFIG_BNX2X_GENEVE

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet driver support
└─>Generic Network Virtualization Encapsulation (GENEVE) support
In linux kernel since version 4.6 (release Date: 2016-05-15)  
This allows one to create GENEVE virtual interfaces that provide
Layer 2 Networks over Layer 3 Networks. GENEVE is often used
to tunnel virtual network infrastructure in virtualized environments.
Say Y here if you want to enable hardware offload support for
Generic Network Virtualization Encapsulation (GENEVE) in the driver.