Gets us about 2x speedup on x86

Controls whether deep PLC is enabled

Shift computation to concealment

No dependency on the data files if no DNN code enabled

And references to nnet_data.h

Signed-off-by: Jean-Marc Valin <jmvalin@amazon.com>

Signed-off-by: Jean-Marc Valin <jmvalin@amazon.com>

Those intrinsics don't actually require alignment so we're OK

Using a max lambda of 0.04

Remove old pitch estimator and retrain all models