RTEMS | riscv: fix FDT length check and FDT pointer type (!1227)

[Mohamed Ayman (@mohamedayman23)]

Mohamed Ayman created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1227

Project:Branches: mohamedayman23/rtems:fix-fdt-len-check-and-pointer-type to rtems/rtos/rtems:main
Author:   Mohamed Ayman



## Summary

riscv: fix FDT length check and FDT pointer type

Fix incorrect comparison between fdt_getprop() length (bytes) and address cells count. The check now uses ac \* sizeof(uint32_t) to avoid reading invalid data.

Also change FDT pointer type from const char \* to const void \* to match libfdt API.

No functional changes.

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View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1227
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