CONFIG_MSM_GPIOMUX is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
CONFIG_MSM_GPIOMUX (not configurable)
modulename: gpiomux.ko
configname: CONFIG_MSM_GPIOMUX
Linux Kernel Configuration
└─>MSM_GPIOMUX
In linux kernel since version 2.6.37 (release Date: 2011-01-04)
Support for MSM V1 TLMM GPIOMUX architecture.