soc: qcom: spss_utils: fix IAR-DB-Recovery

Read calculated cmacs on SUBSYS_AFTER_POWERUP event.
Allow user space to get the calc cmac regardless of ioctl.

Change-Id: I91d87c657a2217f467d3630e0dce41c98497d8bd
Signed-off-by: Amir Samuelov <amirs@codeaurora.org>