CONFIG_MIPS_SEAD is not available for the selected architecture x86.
Result is shown for architecture mips
Support for MIPS SEAD board (EXPERIMENTAL)
configname: CONFIG_MIPS_SEAD
System type
└─>Support for MIPS SEAD board (EXPERIMENTAL)
In linux kernel since version 2.6.12 )
This enables support for the MIPS Technologies SEAD evaluation
board.
board.