RTEMS | bsp/arm/tms570: Invalidate I-cache after copying .fast_text to RAM (!1255)

[Avi Weiss (@thnkslprpt)]

Avi Weiss created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1255

Project:Branches: thnkslprpt/rtems:fix-5581-sync-i-cache to rtems/rtos/rtems:main
Author:   Avi Weiss



## Summary

Fixes #5581 

Adds invalidation of I-cache (using `rtems_cache_invalidate_multiple_instruction_lines` which is included in the wrapper function `rtems_cache_instruction_sync_after_code_change`.

This is to ensure full syncing of the I-cache after copying instructions in `.fast_text` into RAM with `bsp_start_copy_sections_compact` in `bspstarthooks.c`

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View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1255
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