ALSA: hda/realtek: Enable drivers as default

ALSA: hda/realtek: Enable drivers as default

The recent split of Realtek HD-audio driver forced users to choose the
right Kconfigs, but most users have no idea which ones to enable.
Although the distros tend to enable all of them, individual users may
have their own favorites and miss something needed via the version
upgrade.

For smoother upgrade path from the previous kernel configuration, now
we take the following changes:

- CONFIG_SND_HDA_CODEC_REALTEK (which is a menuconfig) is changed from
  bool to tristate again, so that it can take over from the previous
  config gracefully.
- CONFIG_SND_HDA_CODEC_ALC* receive "default y", so that they are
  enabled as default as long as CONFIG_SND_HDA_CODEC_REALTEK is set.
  Those can be still disabled if users want to reduce the size, too.

At least this allows users to run "make oldconfig" and push RETURN
blindly.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250730064639.25617-2-tiwai@suse.de