CONFIG_MACH_NOKIA_RX51 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Nokia N900 (RX-51) phone
modulename: board-rx51.ko
and/orboard-rx51-peripherals.ko
and/orboard-rx51-video.ko
configname: CONFIG_MACH_NOKIA_RX51
Linux Kernel Configuration
└─>TI OMAP/AM/DM/DRA Family
└─>TI OMAP2/3/4 Specific Features
└─>Nokia N900 (RX-51) phone