Transceiver: Restrict conditions where FN gaps are detected
Transceiver: Restrict conditions where FN gaps are detected

In pushRadioVector, like we did for driveTxPriorityQueue already, gaps
are possible in any channel for TRX!=0, since TRX0 is the only one
expected to be always transmitting.

Since we always need to transmit there, it makes no sense to check for
channel being not NONE.

Change-Id: I3b4b85b9100f69dfa113c54a4357120bd11ec86f

osmocom/osmo-trx,osmocom/osmo-trx,osmocom/osmo-trx,osmocom/osmo-trx