default or selected kernelversion does not have config value CONFIG_MVEBU_CLK_CORE.
Result is shown for kernelversion 6.2.5

CONFIG_MVEBU_CLK_CORE (not configurable)

modulename: clk.ko

configname: CONFIG_MVEBU_CLK_CORE

Linux Kernel Configuration
└─>Device Drivers
└─>MVEBU_CLK_CORE
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/clk/mvebu/
is depended by
CONFIG_ARCH_MVEBU