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[Backport v3.7-branch] linker: arc: add .rodata_in_data section to avoid unexpected placement #93043

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Backport 708c1dc from #93015.

The .rodata_in_data section is produced by MWDT toolchain with -Hccm
option enabled. This option moves read-only data from the executable
memory (ICCM) to the data memory (DCCM), improving performance by
reducing conflicts between instruction fetches and data fetches.

Signed-off-by: Ilya Tagunov <Ilya.Tagunov@synopsys.com>
(cherry picked from commit 708c1dc)
@github-actions github-actions bot added the Backport Backport PR and backport failure issues label Jul 11, 2025
@github-project-automation github-project-automation bot moved this to To do in Backports Jul 11, 2025
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