STM32WB ADC : consecutive VBAT reading

[jeromecoutant]

Description

Consecutive VBAT values reading was not possible.

@LMESTM

CI OK:

target	platform_name	test suite	result	elapsed_time (sec)	copy_method
NUCLEO_WB55RG-ARMC6	NUCLEO_WB55RG	tests-api-analogin	OK	16.5	default
NUCLEO_WB55RG-ARMC6	NUCLEO_WB55RG	tests-assumptions-analogin	OK	19.28	default
NUCLEO_WB55RG-GCC_ARM	NUCLEO_WB55RG	tests-api-analogin	OK	17.06	default
NUCLEO_WB55RG-GCC_ARM	NUCLEO_WB55RG	tests-assumptions-analogin	OK	19.84	default
NUCLEO_WB55RG-IAR	NUCLEO_WB55RG	tests-api-analogin	OK	16.45	default
NUCLEO_WB55RG-IAR	NUCLEO_WB55RG	tests-assumptions-analogin	OK	19.22	default

Pull request type

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

Reviewers

Release Notes

[0xc0170]

Can you add this to the commit msg : "Consecutive VBAT values reading was not possible." - reason why stop being added

[ciarmcom]

@jeromecoutant, thank you for your changes.
@ARMmbed/mbed-os-maintainers please review.

[0xc0170]

CI started

[mbed-ci]

Test run: SUCCESS

Summary: 11 of 11 test jobs passed
Build number : 1
Build artifacts

[0xc0170]

I restarted travis, did not report back the status