st-hal: Update lsm_usecase in transition usecases in loaded state

If an LPI/non-LPI transition occurs in the loaded state, the dereg/
reg_sm needs to be called to switch the lsm_usecase to match the
correct lpi_mode.

Change-Id: Ic5f5aef388b0aad7588ffbbe50393c0ca7a2fe5e
1 file changed