rsl: Remove unneeded duplicate reset on some lchan fields
rsl: Remove unneeded duplicate reset on some lchan fields

Both ms_power and ms_power_ctrl are reset to 0 again further below.

Change-Id: Ia2a5da068d440232361d57bd5ac33eddebf05ebe

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