Changes

{bs,ms}_power_control: Move params inside lchan_power_ctrl_state

Those fields are also part of the power control state, since they are
modified through the lifecycle of the lchan eg. during rx of CHAN
(RE)ACT, MS POWER CONTROL, etc. Those should also be reset together with
other fields.

Moreover, with this patch we get rid of an extra indirection pointer
which could be NULL (under static configuration) and hence create
potential problems.

Change-Id: I0e2a6c2c33e0ac9a0bc1734d83eaeafc27f2f4df