default or selected kernelversion does not have config value CONFIG_CPMAC.
Result is shown for kernelversion 6.9.9
TI AR7 CPMAC Ethernet support
modulename: cpmac.ko
configname: CONFIG_CPMAC
Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet driver support
└─>TI AR7 CPMAC Ethernet support
In linux kernel since version 2.6.24 (release Date: 2008-01-24)
TI AR7 CPMAC Ethernet support