CONFIG_TOSHIBA_RBTX4927 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
Support for Toshiba TBTX49[23]7 board
modulename: fixup-rbtx4927.ko
configname: CONFIG_TOSHIBA_RBTX4927
Linux/MIPS Kernel Configuration
└─>Machine selection
└─>Support for Toshiba TBTX49[23]7 board
In linux kernel since version 2.6.12
This Toshiba board is based on the TX4927 processor. Say Y here to
support this machine type
support this machine type