[ALSA] oxygen: separate out hardware initialization code

Create separate functions for the code that initializes the hardware, as
opposed to initializing internal driver state, so that they can be
reused for resume support.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --cc sound/pci/oxygen/hifier.c
Simple merge

diff --cc sound/pci/oxygen/oxygen.c
Simple merge

diff --cc sound/pci/oxygen/virtuoso.c
Simple merge