dsp: fix reset logic during ADSP SSR for lsm

During ADSP SSR, unless all APR clients are de-registered, Glink
channel will not be closed, which will cause Glink channel to remain
in stale/unusable state after ADSP SSR. Fix this by adding APR reset
logic in LSM driver.

Change-Id: Idec26836cfa4ecbacc557996339facd84ac19668
Signed-off-by: Xiaoyu Ye <benyxy@codeaurora.org>