RPI5: add scmi and wifi support

[GrygiriiS]

• Switch ARM TF and XEN on rpi5 dev branches with SCMI support.
• added DT overlays for both SCMI and WIFI.
• updated u-boot script
• Updated rpi5.yaml to add option ENABLE_SCMI and add option to ENABLE_WIFI

Both ENABLE_SCMI and ENABLE_WIFI are disabled by default.

NOTE1. if ENABLE_SCMI is enabled it will change SRAM mapping for Zephyr Dom0 application, so to run, the rpi_5.overlay has to be edited to correct "sram0: memory@10000000" node with proper values.

[GrygiriiS]

@oleksiimoisieiev @lorc @rshym

[rshym]

Acked-by: Ruslan Shymkevych <ruslan_shymkevych@epam.com>

[GrygiriiS]

This PR updated:

• dropped private dev branches
• dropped Zephyr Dom0 Scmi In general, it's ready, but we'ra waiting for Xen SCMI support to be finished.

Test branch to be used for integration can be found here: https://github.com/GrygiriiS/meta-xt-prod-devel-rpi5/tree/rpi5_scmi_wifi_v1_dev

[oleksiimoisieiev]

I think README should be updated as well

[rshym]

After the repush, the first commit message still mentions AUTOREV. The second commit has 'No end-of-the-file" (Red crossed circle).

[oleksiimoisieiev]

This approach to add all scmi related stuff in meta-xt-prod-devel looks as the only acceptable solution. That's because there is a significant difference in Zephyr (Dom0) memory mapping with/w-o SCMI. So we can't make it completely optional (controlled by config param) without making 2 zephyr branches or using special snippets. In any case - every configuration will have it's specific memory-mapping. So when all configuration is on the top layer - it can be used as the reference for making project-specific top meta-layer with or without SCMI enabled. This approach looks good so Reviewed-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com> with a small comments.

[lorc]

Thanks

Acked-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>