flash/stm32l4x: support STM32WBA5xx devices

STM32WBA5x have a single bank flash up to 1MB

Change-Id: I3d720e202f0fdd89ecd8aa7224653ca5a7ae187b
Signed-off-by: Tarek BOCHKATI <[email protected]>
Signed-off-by: Erwan Gouriou <[email protected]>
Reviewed-on: https://review.openocd.org/c/openocd/+/7694
Tested-by: jenkins
Reviewed-by: Tomas Vanek <[email protected]>
Reviewed-by: Antonio Borneo <[email protected]>

The openocd-0.11.0 release.

The openocd-0.11.0-rc2 release.

The openocd-0.11.0-rc1 release.

The openocd-0.10.0 release.

The openocd-0.10.0-rc2 release candidate.

The openocd-0.10.0-rc1 release candidate

The openocd-0.9.0 release.

The openocd-0.9.0-rc1 release.

The openocd-0.8.0 release.