CONFIG_ARCH_ORION5X is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Marvell Orion
configname: CONFIG_ARCH_ORION5X
ARM system type
└─>Marvell Orion
In linux kernel since version 2.6.26 (release Date: 2008-07-13)
Support for the following Marvell Orion 5x series SoCs:
Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)