This patch series adds support for ZFS listing and load to u-boot.
  
  To Enable zfs ls and load commands, modify the board specific config file with
  #define CONFIG_CMD_ZFS
  
  Steps to test:
  
  1. After applying the patch, zfs specific commands can be seen
     in the boot loader prompt using

  	UBOOT #help

  	zfsload- load binary file from a ZFS file system
  	zfsls  - list files in a directory (default /)

  
  2. To list the files in zfs pool, device or partition, execute

  	zfsls <interface> <dev[:part]> [POOL/@/dir/file]
  	For example:
  	UBOOT #zfsls mmc 0:5 /rpool/@/usr/bin/

  
  3. To read and load a file from an ZFS formatted partition to RAM, execute

  	zfsload <interface> <dev[:part]> [addr] [filename] [bytes]
  	For example:
  	UBOOT #zfsload mmc 2:2 0x30007fc0 /rpool/@/boot/uImage

  
  References :
  	-- ZFS GRUB sources from Solaris GRUB-0.97
  	-- GRUB Bazaar repository
  
  Jorgen Lundman <lundman at lundman.net> 2012.