Freescale esdhc-specific options
  
  	- CONFIG_FSL_ESDHC_ADAPTER_IDENT
  		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
  		0b000			reserved
  		0b001			eMMC Card Rev4.5
  		0b010			SD/MMC Legacy Card
  		0b011			eMMC Card Rev4.4
  		0b100			reserved
  		0b101			MMC Card
  		0b110			SD Card Rev2.0/3.0
  		0b111			No card is present
  	- CONFIG_SYS_FSL_ESDHC_LE
  		ESDHC IP is in little-endian mode. Accessing ESDHC registers can be
  		determined by ESDHC IP's endian mode or processor's endian mode.
  	- CONFIG_SYS_FSL_ESDHC_BE
  		ESDHC IP is in big-endian mode. Accessing ESDHC registers can be determined
  		by ESDHC IP's endian mode or processor's endian mode.