- remove printf in nr_ulsch_coding.c
- renaming test_input to mac_pdu
- using memcpy for mac_pdu instead of pointing to data
- remove temp_nfapi struct from header file

- Problem was related to UE_id and G

- Added nr_dft at UE side and nr_idft at gNB side
- NR_SC_FDMA can be found in "PHY/defs_nr_common.h"
- For 1 SNR loop, the code executes correctly
- For more loops, it gives a segmentation fault in the LDPC decoder
- The segmentation fault is caused when nr_idft is used
- The code works fine when the "NR_SC_FDMA" is disabled

- adding SCHED_NR_UE_LIB to ulsim compilation library
- fixing linking compilation problems
- using fapi_nr_dci_pdu_rel15_t struct to initialize PUSCH
- test_input random data is set in phy_procedures_nrUE_TX instead of ulsim

- modifying generate_ue_ulsch_params to work with nfapi_nr_ul_config struct
- removing ulsim_params struct

This fixes the errors in bits introduced after LDPC decoding in case of mod_order = 6 and AMO_SHIFT = 9

One of the function parameters was number of RBs, but instead number of REs was given

Sometimes CRC OK is printed, but there are bits in error at the LDPC decoder output

implementing:
- generate_ue_ulsch_params (customized for ulsim only)
- nr_ue_ulsch_procedures
- nr_ue_pusch_common_procedures

- Added "nr_ulsch.c" file in NR_TRANSPORT
- Renamed "nr_ulsch.c" in NR_UE_TRANSPORT to "nr_ulsch_ue.c"
- Added "nr_ulsch_unscrambling" declaration to "nr_ulsch.h"
- Added "nr_ulsch_unscrambling" definition to "nr_ulsch.c"
- Added new test in "ulsim.c" to test encoding/decoding + scrambling/unscrambling