ALSA: hda - Pass max_slots and power_save to codec_create

Passing the max slots and power save arguments to codec_create will
allow for its reuse by an hda_platform driver. It makes the function
independent of the module params in hda_intel and ready to move to
hda_shared in a following commit.

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>