BTS_Tests: indicate TCH mode to the L1 in f_est_dchan()

Otherwise the L1 (trxcon or Calypso PHY) would 'think' that we're
in signalling mode, and would not send us Bad Frame Indications.

Change-Id: I0ade3bd63f604c7f0665124b182a023d50030d0b
Depends: I6f403ed0506b4b1872361d9976d3186bfe514b52
Related: OS#4799
2 files changed