bts-trx: Fix rxgain & maxdly VTY values being reset
bts-trx: Fix rxgain & maxdly VTY values being reset

Recent commit added code to reset trx_provision_fsm state fields in orer
to support re-using the FSM once BTS is reconnected to a BSC.

However, some values being reset there are not set up when reconnecting
to the BSC, but rather configured through VTY at startup. Hence those
values should be kept.

Fixes: 32b51eca7d2a5215814db7843b1a0f8c74ea7527
Change-Id: I5c31241327b98386c313cd9377cf76c009456105

osmocom/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts