[BOOTTHUNDER] Output \r\n for line feeds.
[CONFIG] Select BitThunder's iomem shell command by default.
[BITTHUNDER] Updated to latest BT. (stable-0.7.0-129-g0595492)
[BOOTTHUNDER] Defined some prototypes for the internal apis.
[BOOTM] Upgraded the bootm code, to work with newer versions of BitThunder.
[BITTHUNDER] Updated bitthunder to support trampoline booting.
[BITTHUNDER] Upgraded bitthunder to support reliable core booting on Zynq with trampoline.
[BOOTTHUNDER] Added optional bootloader timeout.