default or selected kernelversion does not have config value CONFIG_ARM_KS8695_ETHER.
Result is shown for kernelversion 5.9.8

KS8695 Ethernet support

modulename: ks8695net.ko
configname: CONFIG_ARM_KS8695_ETHER

Linux Kernel Configuration
└─> Device Drivers
└─> Network device support
└─> Ethernet driver support
└─> KS8695 Ethernet support

If you wish to compile a kernel for the KS8695 and want to
use the internal ethernet then you should answer Y to this.

source code: