power_control: lchan_ms_pwr_ctrl(): make use of params/state pointers
power_control: lchan_ms_pwr_ctrl(): make use of params/state pointers

Change-Id: I177d82cd61d59256976007fed2f7da400b814789
Related: SYS#4918

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