Adding base class for all LoRa radio drivers
Adding base class for all LoRa radio drivers

All Mbed-OS drivers for LoRa radio devices must implement
this pure virtual class in order to be compliant with Mbed-OS
applications.

This class comes loaded with all necessary data structures.
The implementations of this class can come out of tree.

betzw/mbed-os,kjbracey-arm/mbed,c1728p9/mbed-os,kjbracey-arm/mbed,andcor02/mbed-os,c1728p9/mbed-os,mbedmicro/mbed,c1728p9/mbed-os,mbedmicro/mbed,betzw/mbed-os,betzw/mbed-os,mbedmicro/mbed,mbedmicro/mbed,kjbracey-arm/mbed,andcor02/mbed-os,andcor02/mbed-os,mbedmicro/mbed,andcor02/mbed-os,c1728p9/mbed-os,betzw/mbed-os,betzw/mbed-os,c1728p9/mbed-os,andcor02/mbed-os,kjbracey-arm/mbed,betzw/mbed-os,c1728p9/mbed-os,andcor02/mbed-os