CONFIG_MACH_BERLIN_BG2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Marvell Armada 1500 (BG2)
modulename: bg2.ko
configname: CONFIG_MACH_BERLIN_BG2
Linux Kernel Configuration
└─>Marvell Berlin SoCs
└─>Marvell Armada 1500 (BG2)