Version 2.3.0

This version extends tegra-bootloader-update --initialize to overwrite the boot device pseudo-GPT on tegra186 and tegra194 platforms, to allow an installation script to handle updates that change the partitioning of the boot device storage. This, combined with a suitable set of commands for repartitioning the eMMC (which should be run first, since boot partitions can reside in the eMMC), supports creating an installer that can run from RAM (e.g., in an initial RAM disk) for upgrading between L4T BSP versions that change bootloader partition layouts.