CONFIG_ETRAX_SPI_MMC is not available for thedefaultarchitecture x86.
Result is shown for architecture cris

CONFIG_ETRAX_SPI_MMC (not configurable)

configname: CONFIG_ETRAX_SPI_MMC

Linux Kernel Configuration
└─>ETRAX_SPI_MMC
In linux kernel since version 2.6.25 (release Date: 2008-04-16)