Userspace tools for MMC/SD devices

 mmc-utils is a tool that supports the MMC device development of Linux kernel.
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 The mmc-utils tools can do the following:
  - Print and parse extcsd data.
  - Determine the eMMC writeprotect status.
  - Set the eMMC writeprotect status.
  - Set the eMMC data sector size to 4KB by disabling emulation.
  - Create general purpose partition.
  - Enable the enhanced user area.
  - Enable write reliability per partition.
  - Print the response to STATUS_SEND (CMD13).
  - Enable the boot partition.
  - Set Boot Bus Conditions.
  - Enable the eMMC BKOPS feature.
  - Permanently enable the eMMC H/W Reset feature.
  - Permanently disable the eMMC H/W Reset feature.
  - Send Sanitize command.
  - Program authentication key for the device.
  - Counter value for the rpmb device will be read to stdout.
  - Read from rpmb device to output.
  - Write to rpmb device from data file.
  - Enable the eMMC cache feature.
  - Disable the eMMC cache feature.
  - Print and parse CID data.
  - Print and parse CSD data.
  - Print and parse SCR data.