library: L1CTL: add 'start_fn' field to UL/DL TBF CFG.req messages

Change-Id: I800e4813671e92f6010945d58dfe6297302c6f13
Related: osmocom-bb.git Ibb6a05165fe1c81268fb0e3674adae4065e78171
Related: OS#5500, OS#6147
1 file changed