tests: subsys: settings: functional: fcb: system.settings.functional.fcb fails

[nordic-piks]

Describe the bug
The tests/subsys/settings/functional/fcb/system.settings.functional.fcb fails

Observed for

• nrf52840dk_nrf52840
• nrf52dk_nrf52832

To Reproduce
Steps to reproduce the behavior:

1. have nrf52840dk_nrf52840 connected
2. go to your zephyr dir
3. call ./scripts/twister -T tests/subsys/settings/functional/fcb -p nrf52840dk_nrf52840 --device-testing --device-serial /dev/ttyACM0 -v --inline-logs
4. See console output with error

Expected behavior
Valid console output

Impact
Not clear

Logs and console output

[2022-08-11T22:11:39.153Z] PROJEng Zephyr OS build zephyr-v3.1.0-3361-gb076aa373a63  ***
[2022-08-11T22:11:39.153Z] Running TESTSUITE settings_test_suite
[2022-08-11T22:11:39.153Z] ===================================================================
[2022-08-11T22:11:39.153Z] START - test_clear_settings
[2022-08-11T22:11:39.153Z] PASS - test_clear_settings in 1.350 seconds
[2022-08-11T22:11:39.153Z] ===================================================================
[2022-08-11T22:11:39.153Z] START - test_support_rtn
[2022-08-11T22:11:39.153Z] PASS - test_support_rtn in 0.1 seconds
[2022-08-11T22:11:39.154Z] ===================================================================
[2022-08-11T22:11:39.154Z] START - test_register_and_loading
[2022-08-11T22:11:39.154Z] PASS - test_register_and_loading in 0.5 seconds
[2022-08-11T22:11:39.154Z] ===================================================================
[2022-08-11T22:11:39.154Z] START - test_direct_loading
[2022-08-11T22:11:39.154Z] PASS - test_direct_loading in 0.6 seconds
[2022-08-11T22:11:39.154Z] ===================================================================
[2022-08-11T22:11:39.154Z] START - test_direct_loading_filter
[2022-08-11T22:11:39.154Z] -- Called: val/1
[2022-08-11T22:11:39.154Z] -- Called: val/2
[2022-08-11T22:11:39.154Z] -- Called: val/3
[2022-08-11T22:11:39.154Z] -- Called: val/4
[2022-08-11T22:11:39.154Z] -- Called: val/1
[2022-08-11T22:11:39.154Z] -- Called: val/2
[2022-08-11T22:11:39.154Z] -- Called: val/3
[2022-08-11T22:11:39.154Z] -- Called: val/4
[2022-08-11T22:11:39.154Z] PASS - test_direct_loading_filter in 0.67 seconds
[2022-08-11T22:11:39.154Z] ===================================================================
[2022-08-11T22:11:39.154Z] START - test_setting_storage_get
[2022-08-11T22:11:39.154Z] Assertion failed at ../../../../../../../../../../zephyr/zephyr/tests/subsys/settings/functional/fcb/settings_test_fcb.c:24: test_setting_storage_get: (rc not equal to 0)
[2022-08-11T22:11:39.154Z] Can't read fcb (err=-134)
[2022-08-11T22:11:39.154Z] FAIL - test_setting_storage_get in 0.18 seconds
[2022-08-11T22:11:39.154Z] ===================================================================
[2022-08-11T22:11:39.154Z] TESTSUITE settings_test_suite failed.
[2022-08-11T22:11:39.154Z] ===================================================================
[2022-08-11T22:11:39.154Z] RunID: 42a03f6fdba8863acccdd0a2dec76168
[2022-08-11T22:11:39.154Z] PROJECT EXECUTION FAILED

Environment (please complete the following information):

• OS: Ubuntu 20.04.1 LTS
• Toolchain Zephyr SDK 0.14.1
• Commit SHA or Version used: v3.1.0-3361-gb076aa373a63

[nvlsianpu]

These tests are passing currently (zephyr-v3.1.0-5182-g85445474f29e)