gsm_bts_trx_set_system_infos(): Disable non-existing SI

If we previously had a given SI present/active, we must send a
zero-length BCCH FILLING for that SI type to the BTS to stop it from
further transmitting this SI.

Change-Id: I33e356e2fa3a69efac9080813e3e9ef4e6438ed1
Closes: OS#2368
1 file changed