doc/README.fsl-esdhc

   1 CONFIG_SYS_FSL_ESDHC_LE means ESDHC IP is in little-endian mode.
   2 CONFIG_SYS_FSL_ESDHC_BE means ESDHC IP is in big-endian mode.
   3 CONFIG_SYS_FSL_ESDHC_FORCE_VSELECT forces to run at 1.8V.
   4
   5 Accessing ESDHC registers can be determined by ESDHC IP's endian
   6 mode or processor's endian mode.