MCUXpresso: Fix for the TRNG HAL driver

[mmahadevan108]

Description

Apply the fix from K64F TRNG HAL driver. Details can be found in the PR #5550

Pull request type

[X] Fix
[ ] Refactor
[ ] Target update
[ ] Functionality change
[ ] Docs update
[ ] Test update
[ ] Breaking change

[mmahadevan108]

cc @cmonr

[cmonr]

Holding off until we get this in: #8436

Something with our unittest merge check got out of sync, causing all new PRs to fail.

[cmonr]

Error is now understood much better. This can start CI. The individual job will simply be retruggered once the fix is merged, but it doesn't block other tests.

/morph build

[mbed-ci]

Build : FAILURE

Build number : 3365
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/8437/

[NirSonnenschein]

IAR license related failure: re-running
/morph build

[mbed-ci]

Build : SUCCESS

Build number : 3370
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/8437/

Triggering tests

/morph test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 3003
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/8437/

[mbed-ci]

Test : SUCCESS

Build number : 3172
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8437/3172