Transciever: Log values causing Tx underrun
Transciever: Log values causing Tx underrun

Change-Id: I68e18075eade55034567d96fc774d00a794afeeb

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