CONFIG_MMC_SDHCI_IO_ACCESSORS (not configurable)

configname: CONFIG_MMC_SDHCI_IO_ACCESSORS

Linux Kernel Configuration
└─>Device Drivers
└─>MMC/SD/SDIO card support
└─>MMC_SDHCI_IO_ACCESSORS
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
This is silent Kconfig symbol that is selected by the drivers that
need to overwrite SDHCI IO memory accessors.