The header version field is 4 bit long, so the mask 0x07 == 0b111
is wrong, it should actually be 0x0f == 0b1111.
Change-Id: I290931559ce01cf6e43470b18855c46808d6c2a5
Only old v0 is supported so far. TRXD protocol related data/logic is
moved to its own file out of Transceiver class. Code is refactored so it
can be re-used later by TRXDv1.
Related: OS#4006
Change-Id: I5786dd44b076202c6f1a6e82405670e8605797ed