lms: Allow setting Tx/RxFreq for lchan!=0
lms: Allow setting Tx/RxFreq for lchan!=0

Related: OS#3346
Change-Id: I9dd0bb41d1863111d28947fc0d7c7e7ecfaf5fa8

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