CONFIG_ARCH_ROCKCHIP is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64
Rockchip Platforms
modulename: rockchip.ko
configname: CONFIG_ARCH_ROCKCHIP
Linux Kernel Configuration
└─>Platform selection
└─>Rockchip Platforms
In linux kernel since version 3.10 (release Date: 2013-06-30)
This enables support for the ARMv8 based Rockchip chipsets,
like the RK3368.
like the RK3368.