ALSA: hda - Drop bus->avoid_link_reset flag

Use bus->power_keep_link_on instead.  The controller shouldn't go to
D3 when the link isn't reset, so essentially avoiding the link reset
means avoiding the runtime PM.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --cc sound/pci/hda/hda_codec.h
Simple merge

diff --cc sound/pci/hda/hda_intel.c
Simple merge

diff --cc sound/pci/hda/patch_sigmatel.c
Simple merge