[U-Boot] [PATCH] EXT4

Slowly getting the hang of github and u-boot. I took a fork of u-boot 20120520, and merged in the EXT4 patched.

In addition to Samsung's work;

* Fix minor string ext2->ext4 * 'unsigned' sectors for volumes over 1TB * changed to fit with current u-boot compile env

https://github.com/lundman/u-boot/compare/upstream...upstream-ext4

There is a new limit of 2TB with 512 byte blocks. To go beyond that would require "disk_partition_t" to go bigger than 32bit. I think that is outside of my access permissions.