fngboot/mx6boot: update to FnG-Boot v16 release with U-Boot support
This patch updates Yocto recipes to include FnG-Boot v16.0 release, which officially adds support for U-Boot as 2nd stage loader.
As of 8 April 2024, the git.seco.com instance was upgraded to the Premium version. External users and SECO customers who need access to private groups or repositories can make a request by contacting SECO support team via the ticketing platform (https://support.seco.com/).
This patch updates Yocto recipes to include FnG-Boot v16.0 release, which officially adds support for U-Boot as 2nd stage loader.