[MACH] ZYNQ - Updated startup code to be compatible with latest BitThunder.
[SUBMODULE] BitThunder - Upgraded to latest version, with improved startup code handling.
[SUBMODULE] Updated to BitThunder 0.8.0-pre with OCM to DDR relocation support.
[BOOTTHUNDER] Updated BT, and implemented basic fallback shell.
[BOOT] Signal booted immediately, boot-script is now bootthunder.cfg
[KCONFIG] Updated default bitthunder selects.
[BITTHUNDER] Updated to latest edition with support for source kernel command.