issue: 3465282 Fix IB clock converter inaccuracy

[agalanin-at-nvidia]

Description

Use proper multiplier while converting HCA core clock frequency into Hz.

What

Fix IB clock converter inaccuracy

Why ?

Invalid value for hca core clock frequency was used in time_converter_ib_ctx::calculate_delta.

How ?

We used hca_core_clock for clock conversion from HW timestamp to system clock. But the value for hca_core_clock variable is converted from device capabilities as it's in MHz (multiplied to 1000000=USEC_PER_SEC). That's look wrong because ibv_device_attr_ex.hca_core_clock is in Khz.

Change type

What kind of change does this PR introduce?

• [x] Bugfix
• [ ] Feature
• [ ] Code style update
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation content changes
• [ ] Tests
• [ ] Other

Check list

• [+] Code follows the style de facto guidelines of this project
• [+] Comments have been inserted in hard to understand places
• [-] Documentation has been updated (if necessary)
• [-] Test has been added (if possible)

[swx-jenkins5]

Can one of the admins verify this patch?