Transceiver52M: Reduce RACH and TSC correlation windows
Transceiver52M: Reduce RACH and TSC correlation windows

Start the correlation search window at 4 symbols before
the expected correlation peak. End the search at 10
symbols and 4 + maximum expected delay for RACH and TSC
bursts respectively.

This change lowers receive side cpu utilization while
maintaining reasonable timing jitter and accuracy tolerance.

Signed-off-by: Thomas Tsou <96835dd8bfa718bd6447ccc87af89ae1675daeca@tsou.cc>

kkroo/osmo-trx,kkroo/osmo-trx,pothosware/osmo-trx,telenoobie/osmo-trx,ttsou/osmo-trx,pothosware/osmo-trx,osmocom/osmo-trx,osmocom/osmo-trx,osmocom/osmo-trx,ttsou/osmo-trx,telenoobie/osmo-trx,kkroo/osmo-trx,ttsou/osmo-trx,telenoobie/osmo-trx,telenoobie/osmo-trx,pothosware/osmo-trx,kkroo/osmo-trx,ttsou/osmo-trx,pothosware/osmo-trx,osmocom/osmo-trx