default or selected kernelversion does not have config value CONFIG_INFINIBAND_I40IW.
Result is shown for kernelversion 6.9.9
Intel(R) Ethernet X722 iWARP Driver
modulename: i40iw.ko
configname: CONFIG_INFINIBAND_I40IW
Linux Kernel Configuration
└─>Device Drivers
└─>InfiniBand support
└─>Intel(R) Ethernet X722 iWARP Driver
In linux kernel since version 3.10 (release Date: 2013-06-30)
Intel(R) Ethernet X722 iWARP Driver