[Armbian build PR] - Fix several issues related to building U-Boot

[RSS Bot]

Description

• Some older U-Boot versions don't use semantic versioning in their code and will fail when building libfdt. This is fixed by hardcoding a semantic version.
• rk35xx used a very old branch from Radxa vendor U-Boot and won't build with GCC13. Bump it to the latest version.

GitHub issue reference: https://github.com/armbian/build/issues/6862 Jira reference number AR-2402

How Has This Been Tested?

• [x] ./compile.sh uboot BOARD=radxa-e25 BRANCH=edge BUILD_DESKTOP=no BUILD_MINIMAL=no EXPERT=yes KERNEL_CONFIGURE=no RELEASE=noble ARTIFACT_IGNORE_CACHE=yes
• [x] ./compile.sh uboot BOARD=nanopi-r2s BRANCH=edge BUILD_DESKTOP=no BUILD_MINIMAL=no EXPERT=yes KERNEL_CONFIGURE=no RELEASE=noble ARTIFACT_IGNORE_CACHE=yes
• [x] ./compile.sh uboot BOARD=nanopineo3 BRANCH=edge BUILD_DESKTOP=no BUILD_MINIMAL=no EXPERT=yes KERNEL_CONFIGURE=no RELEASE=noble ARTIFACT_IGNORE_CACHE=yes

@efectn Building OrangePi5 U-Boot from Xunlong also fails on Ubuntu 24.04. Please consider using the default Radxa U-Boot for rk3588 by removing the extra lines from the OrangePi5 configs.

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] My changes generate no new warnings
• [x] Any dependent changes have been merged and published in downstream modules

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