MFC r338038: Extending the delay cycles to give the codec more time to pump ADC data across the AC-link.

Without this patch, some CS4614 cards will need users to reload the driver manually or
the hardware won't be initialised properly. Something like:

1. kldload snd_csa
2. kldunload snd_csa
3. kldload snd_csa

Tested with: Terratec SiXPack 5.1+