[E58] Make adjustments for RevB of the module
This MR includes changes, introduced in Revision B of the E58 module. Got OK from Marco that we can completely drop support of the RevA (still available in Clea OS 1.06 release). Anyway there were only quite a few samples and it's a pre-series revision.
- New STM32
- New RTC
- Minor adjustments and cleanup of the device trees
- Renamed the device trees to match the SECO naming convention