stm32: test: drivers: memc: ram: fix a specific SRAM memory overflow issue during the build process

[djiatsaf-st]

This commit 23ebd62 adds changes to update the buffer size to the full PSRAM size when the PSRAM node is available.
Now, on a board like stm32h7s78_dk, where both internal and external flash nodes are enabled, the test runs into SRAM overflow with the following errors: ...

...zephyr/zephyr_pre0.elf section `SRAM1' will not fit in region `SRAM1' 
...zephyr/zephyr_pre0.elf section `SRAM2' will not fit in region `SRAM2' 
...
...region `SRAM1' overflowed by 2080768 bytes 
...region `SRAM2' overflowed by 2080768 bytes 

To run tests successfully, mutual exclusion between SRAM and PSRAM needs to be implemented, so the correct buffer size is chosen for the correct peripheral.

To reproduce :

west build -p -b stm32h7s78_dk/stm32h7s7xx tests/drivers/memc/ram -T drivers.memc

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[etienne-lms]

I think P-R #96635 has fixed the issue you are addressing here. It's been merged very recently.

[djiatsaf-st]

I think P-R #96635 has fixed the issue you are addressing here. It's been merged very recently.

Indeed, Thanks