util: no_os_util: Update GCD for faster execution

[chegbeli]

Pull Request Description

The greatest common divisor in the previous version was executing slow. In most cases this will not be noticeable, but some drivers will need a faster execution of the GCD in order to reduce the response time of those drivers. This has been noticed with the ADF4382 and has been tested with the design to check that the new implementation is working.

PR Type

• [x] Bug fix (change that fixes an issue)
• [ ] New feature (change that adds new functionality)
• [ ] Breaking change (has dependencies in other repos or will cause CI to fail)

PR Checklist

• [x] I have followed the Coding style guidelines
• [x] I have performed a self-review of the changes
• [ ] I have commented my code, at least hard-to-understand parts
• [ ] I have build all projects affected by the changes in this PR
• [x] I have tested in hardware affected projects, at the relevant boards
• [x] I have signed off all commits from this PR
• [ ] I have updated the documentation (wiki pages, ReadMe etc), if applies