E39: Use new unified kernel config, include overlay files in compilation, revert default behaviour to B79
This MR adjusts the machine layer to use the B79 board as default, as decided for https://secogroup.atlassian.net/browse/MODV-159.
- Use the new unified seco_imx_v8_defconfig
- Do not include atf patch, as the B79 uses the default serial port. When using another carrier board such as Modular Vision, we can include the patch again to resume functionality for said board.
- The newly added kernel device tree & device tree overlay structure from clea-os/bsp/nxp/linux-seco-imx!308 is now used for building.
The new files need to be compiled with the kernel, as well as included in the U-Boot's seco-config tool to select the overlays. Due to this, the ticket requires 3 MRs, namely in Linux, the bootloader (U-Boot), and the meta-seconorth-machine layer (later CLEA-OS).
Edited by Christos