audio/libbs2b: Don't clip floating point samples

Disable clamping as it causes incorrect behaviour
While at it return port to pool as maintainer hasn't responded on
multiple bug reports.

Reference:
https://github.com/strawberrymusicplayer/strawberry/issues/1320

Source:
https://github.com/alexmarsev/libbs2b/commit/5ca2d59888df047f1e4b028e3a2fd5be8b5a7277

PR: 275403
Approved by: portmgr (maintainer timeout, 2+ weeks)