tests: drivers: pwm: pwm_api: failed on nucleo_f207zg

[ABOSTM]

Describe the bug
Since introduction of pwm on nucleo_f207zg (#34348),
tests/drivers/pwm/pwm_api fails on this board.
(before #34348, test was skipped)

To Reproduce
Steps to reproduce the behavior:

1. west build -p auto -b nucleo_f207zg tests/drivers/pwm/pwm_api
2. west flash
3. See error

Expected behavior
test passed

Logs and console output
*** Booting Zephyr OS build zephyr-v2.5.0-2328-g679df67940c9 ***

Running test suite pwm_basic_test
===================================================================
START - test_pwm_usec
[PWM]: 1, [period]: 2000, [pulse]: 1000
Fail to set the period and pulse width

    Assertion failed at WEST_TOPDIR/zephyr/tests/drivers/pwm/pwm_api/src/test_pwm.c:140: test_pwm_usec: test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_USEC, DEFAULT_PULSE_USEC, UNIT_USECS) == TC_PASS is false

 FAIL - test_pwm_usec in 0.26 seconds
===================================================================
START - test_pwm_nsec
[PWM]: 1, [period]: 2000000, [pulse]: 1000000
Fail to set the period and pulse width

    Assertion failed at WEST_TOPDIR/zephyr/tests/drivers/pwm/pwm_api/src/test_pwm.c:158: test_pwm_nsec: test_task(DEFAULT_PWM_PORT, DEFAULT_PERIOD_NSEC, DEFAULT_PULSE_NSEC, UNIT_NSECS) == TC_PASS is false

 FAIL - test_pwm_nsec in 0.26 seconds
===================================================================
START - test_pwm_cycle
[PWM]: 1, [period]: 64000, [pulse]: 32000
[PWM]: 1, [period]: 64000, [pulse]: 64000
[PWM]: 1, [period]: 64000, [pulse]: 0
 PASS - test_pwm_cycle in 2.11 seconds
===================================================================
Test suite pwm_basic_test failed.
===================================================================
PROJECT EXECUTION FAILED

Environment (please complete the following information):

• OS: Windows
• Toolchain gnuarmemb
• Commit SHA 679df67