Fix #1406, Squash RTEMS sem take timeout bug

[skliper]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License Agreement to [email protected] and copied [email protected].

Describe the contribution

• Fix Calling OS_CountSemTimedWait on RTEMS with 0 timeout waits forever #1406

Testing performed
Ran on RTEMS 5 w/ CF semaphore flow control using counting semaphore and it worked.

Expected behavior changes

• Squashes bug, sem take with no timeout works

System(s) tested on

• Hardware: leon3 QEMU
• OS: RTEMS 5
• Versions: basically main w/ local RTEMS mods

Additional context
Opened separate issue to add functional test that covers both counting and binary semaphores

• Add functional test for sem takes with 0 timeout #1411

Third party code
None

Contributor Info - All information REQUIRED for consideration of pull request
Jacob Hageman - NASA/GSFC

[skliper]

@dmknutsen @dzbaker - can I submit this as-is and write a follow up issue for adding the functional test?

[dzbaker]

@dmknutsen @dzbaker - can I submit this as-is and write a follow up issue for adding the functional test?

That sounds good!