Merge branch 'next' of https://source.denx.de/u-boot/custodians/u-boot-riscv into next

CI result shows no issue:
https://source.denx.de/u-boot/custodians/u-boot-riscv/-/pipelines/22315
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- Aspeed: Add AST2700 board (Ibex RISC-V core) support
        - Add timer, dram controller, network support
- Sophgo: Add clock controller support for Milk-V Duo