st-hal: Support for SVA 5.0 second stage

- Pass second stage buffer in multiple of 10 msecs.
- Calling (2nd stage) capi_v2_end for keyword detection
  also (previously only for user verification).
- Ignore UBM model as that is only relevant to user
  training the model

Change-Id: I085b8bd11caf64122873c43dc62d466061918c9e
5 files changed