Adding stmod_cellular component #10866
stmod_cellular component library adds up support for cellular modem that
Currently supported modems are BG96 and UG96.
Support is fully derived from BG96 and UG96 support from cellular framework, mainly soft power on and off sequences are adapted here.
Pull request type
This library allows enabling the cellular module that is connected to the STMOD+ connector of the board.
Currently supported cellular modules are Quectel UG96 and BG96 expansion boards that are included in [p-l496g-cell01] (https://www.st.com/en/evaluation-tools/p-l496g-cell01.html) and [p-l496g-cell02.] (https://www.st.com/en/evaluation-tools/p-l496g-cell02.html) packs.
The STMOD+ Connector specification can be found [here] (https://www.st.com/content/ccc/resource/technical/document/technical_note/group0/04/7f/90/c1/ad/54/46/1f/DM00323609/files/DM00323609.pdf/jcr:content/translations/en.DM00323609.pdf).