[PATCH Fix for Kingston HyperX Amp (0951:16d8) 0/2 (Try #2)]

From: Chris Wulff crwulff@gmail.com

This patch set is modified to use an inline function for the mixer control interface lookup. The attempt at preventing modifications to a PCM that has previously been registered has been changed to defer registration instead, and has been split into a separate patch. This approach now works with pulseaudio.