[RPI][QEMU] Add hardware support
Added hardware support for the following platforms:
- RPI: Raspberry PI. Tested RPI4 only. Full support for both Embedded and Things distro.
- QEMU: support for generic ARM/ARM64/x86 architecture.
In addition, there is also the change of the folder where SECO layers are placed: layers -> layers/meta-seco
Edited by Davide Cardillo