mps2: put the .gnu.sgstubs section in a hard coded address

[EgorGrek]

Description

if the address of .gnu.sgtubs is not defined, it's not possible to provide correct SAU permission for non-secure callable code
I faced the problem that .gnu.sgtubs was placed at 0x00001XXXX addresses (probably the .text section is larger than 4kb), but the non-secure callable code permission was provided for 0x10000000 - 0x1000FFFF addresses, so I got a Hard Fault each time the non-secure world calls a secure function.
Also, I added the check for the size of .gnu.sgtubs section, It will notify a developer about a problem if the section is too big, because in this case it will not be covered by the SAU permission for non-secure callable code

Fixes # SAU non-secure callable permission does not cover .gnu.sgtubs section

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code cleanup/refactoring
• CI system update
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

The non-secure world crashed(got Hard Fault) at the start before the fix, after the fix it's working.

Test Configuration:

• Firmware version: -
• Hardware: QEMU v9.2.0/mps2-an505-qemu
• Toolchain: gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0 / GNU Make 4.3
• SDK: -

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[github-actions]

@tdrozdovsky
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