CONFIG_SOC_CANAAN is not available for thedefaultarchitecture x86.
Result is shown for architecture riscv

Canaan Kendryte K210 SoC

configname: CONFIG_SOC_CANAAN

Linux Kernel Configuration
└─>SoC selection
└─>Canaan Kendryte K210 SoC
In linux kernel since version 5.2 (release Date: 2019-07-07)  
This enables support for Canaan Kendryte K210 SoC platform hardware.