hal: Fix combo device issue with routing change

- If one of the split backends match with derived sound
  device, we are disabling only the backends that do not
  match with derived sound device. This was introduced
  with Change-Id: I171fbead85746a2a34632f7580f56ef40505665c
- However, the change does not clean up the combo device
  which is being disabled.
- We need to decrement reference count of combo device and
  send some updates for combo device along with the change
  mentioned above. Not doing this can lead to combo device
  not getting enabled on subsequent tries.
  This change fixes the above issue.
- Also, if one of the split backends matches with derived
  sound device, do not re-enable the device.

Change-Id: Id1bd00bfa5f0236400529e5771851749421ac84c