jetson-xavier-nx-devkit-emmc: add BUP support for FAB 300
jetson-xavier-nx-devkit-emmc: add BUP support for FAB 300

Jetson Xavier NX devkit modules got a version bump, so to make
sure that we can build compatible BUP payloads, add that FAB to the
list of specs is needed.

Signed-off-by: Ilies CHERGUI <0ece7b1bac51c17dc3763eaa1bbbfbc92cd5b790@gmail.com>

madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra