dlx: Add performance profiles to recovery

Enable low power mode.

When performing intensive work, bring all cores online.

Change-Id: I001c7f0194c623f5b3a06dc252c11d8e5ee2aa4c
dlx: Fix remote submix sample rate

Only list 48000 Hz in supported sampling rates for remote submix
output and input stream profiles to avoid mismatch betwen playback
and capture.

Change-Id: I1ec9b7a723e21ccad7bbd8d23d794d099d8afc38