|Freescale esdhc-specific options
|Support Freescale adapter card type identification. This is implemented by
|operating Qixis FPGA relevant registers. The STAT_PRES1 register has SDHC
|Card ID[0:2] bits showing the type of card installed in the SDHC Adapter Slot.
|SDHC Card ID[0:2] Adapter Card Type
|0b001 eMMC Card Rev4.5
|0b010 SD/MMC Legacy Card
|0b011 eMMC Card Rev4.4
|0b101 MMC Card
|0b110 SD Card Rev2.0/3.0
|0b111 No card is present
|ESDHC IP is in little-endian mode. Accessing ESDHC registers can be
|determined by ESDHC IP's endian mode or processor's endian mode.
|ESDHC IP is in big-endian mode. Accessing ESDHC registers can be determined
|by ESDHC IP's endian mode or processor's endian mode.