Integrate meta-seco-rk/support_rk3588

Commit: https://git.seco.com/edgehog/layers/seco/meta-seco-rk/-/commit/5984a490c2b60a68a339ac79ee3fef9daf5f5e6b

[U-BOOT][RK3588] Change RKBIN branch for RK3588 specific version

An upgraded version of rkbin is necessary to correctly boot boards based on this processor. The new version has been downloaded and committed in a new branch, but before merging it we need to fix and check recipes also for boards based on RK3568.

This commit temporarily solves the problem by pointing to the dedicated branch of rkbin. Once the porting will be completed, this commit should be reverted.

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Commit: https://git.seco.com/edgehog/layers/seco/meta-seco-rk/-/commit/d7588c001e2edd076c44df38d3cde34739044e72

[U-BOOT][RK3588] Fix recipe for automatic uart baudrate correction in rkbin binary

Natively rkbin binaries are configured for 1.5M. However we use them configured to 115200. Up to now the binary was corrected and repushed in the original repository. It is much better to correct the speed in this recipe, as already proposed by N.Kovalenko for PX30.

This patch adds this step to the u-boot build procedure. The implementation, however, is slightly different, as e prefer to correct the single baud rate value in the file and maintain the others. Moreover, the fix is done in prepend.

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Commit: https://git.seco.com/edgehog/layers/seco/meta-seco-rk/-/commit/f63c8427514c9eebcd0c44030c6487eab7a78c97

[WIC] Add disk layout for RK3588 CPU

This is to be intended temporary since in the feature there is no reason to have the same disk layout for all RK's CPUs.

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Commit: https://git.seco.com/edgehog/layers/seco/meta-seco-rk/-/commit/407d2065603a48450d70105debcbf7746ca27747

[U-BOOT] Add U-Boot 2017.04 recipe for RK3588 support

This recipe is to be intended as temporary. It uses the same repository used by already present recipe for the U-Boot used for C31 and D23, but a different branch.

This is the same approach taken for RK3568, and should be unified as soon as possible.