UL-MIMO working with 2 layers
- Change RRC configuration for UL (maxMIMO_Layers=2 and maxRank=2);
- Fix size of UE_Capability_nr message at UE;
- SRS configuration based on UE_Capability_nr message;
- Computation of UL number of layers based on SRS up to 2x2 scenario;
- Compute TPMI based on SRS for 2 layers;
- Add CI tests for UL-2 layers with 16QAM and 64QAM.
This branch has been tested in RFSim and with COTS UE.