[D18] fix SPL boot from eMMC
- fix the address to load U-Boot from, that was set incorrectly in case of boot from eMMC
- add the defconfig options for the eMMC to SPL
Hi all, Gitlab will be set in maintenance mode on Friday 29/11/2024 from 08:45 AM CET with the intention of finishing by the 10:45 PM CET of Friday 29/11/2024