CONFIG_MACH_OPENRD_CLIENT is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_OPENRD_CLIENT.
Result is shown for kernelversion 6.5.1

Marvell OpenRD Client Board

configname: CONFIG_MACH_OPENRD_CLIENT

Linux Kernel Configuration
└─>Marvell Kirkwood Implementations
└─>Marvell OpenRD Client Board
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
Say 'Y' here if you want your kernel to support the
Marvell OpenRD Client Board.