Don't return errors in sceSasSetPause().

-1 is perfectly valid, we just need to not infinite loop in that case by
using a logical shift not an arithmetic one.
Use the 1 bit in sceSasRevVON() and cleanup.

Not used yet anyway.
Adjust some default values for SAS audio.
Merge pull request #2231 from unknownbrackets/sas-minor

Fix sceSasSetPause() error code, update default SAS values