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

MMC/SD card write-protect pin for SPI using gpio (space for none)

configname: CONFIG_ETRAX_SPI_MMC_WP_GPIO_PIN

Linux Kernel Configuration
└─>MMC/SD card write-protect pin for SPI using gpio (space for none)
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
The pin to use for the SD/MMC write-protect signal for a memory
card. If defined as " " (space), the card is considered writable.