pelux.xml: switch meta-tegra to thud-l4t-r28.3
pelux.xml: switch meta-tegra to thud-l4t-r28.3

thud branch of meta-boot2qt currently only supports NVIDIA L4T 28.3.

Switch BSP meta-layer to thud-l4t-r28.3 branch to align Tegra BSP with
Boot to Qt.

Signed-off-by: Oleksandr Kravchuk <da66fcdb9815331ae441a2bc352cef73cf081e1e@pelagicore.com>

Pelagicore/pelux-manifests,sashko/pelux-manifests