Integration 2022 wk10

MR !1473 (merged) sync CU/DU files
MR !1476 (merged) remove lfds v6
MR !1450 (merged) UE PBCH optimizations
MR !1486 (merged) fixes in documentation
MR !1474 (merged) support for USRP x400
MR !1488 (merged) SA SR hotfix

Next potential merges:
MR1437 vrb_map UL optimizations
MR1481 fixes for NR-UE
MR1453 memory optimizations