CONFIG_MACH_TRIMSLICE is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_TRIMSLICE.
Result is shown for kernelversion 6.2.5

TrimSlice board

modulename: board-trimslice.ko

and/or

board-trimslice-pinmux.ko

configname: CONFIG_MACH_TRIMSLICE

Linux Kernel Configuration
└─>TrimSlice board
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Support for CompuLab TrimSlice platform

source code:
arch/arm/mach-tegra/board-trimslice.c