ALSA: hda/scodec: add AW88399 HDA side codec driver

Add an HDA side codec driver for the AWINIC AW88399 smart amplifier,
enabling its use as a companion amplifier on HDA systems where the
chip is connected via I2C to the host and driven alongside a primary
HDA codec (such as Realtek ALC287).

The driver is structured after the existing side codec drivers:

* aw88399_hda_i2c.c: I2C bus driver matching ACPI HID "AWDZ8399" and
  serial-multi-instantiate device name "aw88399-hda".
  Creates the regmap and passes it to the shared probe function,
  following the CS35L41/CS35L56/TAS2781 pattern.

* aw88399_hda.c: Core driver implementing HDA component binding,
  playback hooks (using the shared library's start/stop functions),
  ACPI subsystem ID retrieval, and runtime/system power management.
  Includes per-model quirk infrastructure using ACPI subsystem ID
  matching; the quirk table is empty in this patch and populated in
  the next patch along with the corresponding Realtek fixups that
  activate the driver.

The driver includes <sound/aw88399.h> for shared definitions and
depends on SND_SOC_AW88399_LIB for chip initialization, firmware
loading, and playback control, avoiding any dependency on the full
ASoC codec module.

Tested-by: Nadim Kobeissi <nadim@symbolic.software>
Tested-by: Xia Yun'an <imitoy@imitoy.top>
Tested-by: Munzir Taha <munzirtaha@gmail.com>
Co-developed-by: Yakov Till <yakov.till@gmail.com>
Signed-off-by: Yakov Till <yakov.till@gmail.com>
Signed-off-by: Marco Giunta <marco_giunta@outlook.it>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/DS7PR19MB77247D67E739956AA4611ACEFCCA2@DS7PR19MB7724.namprd19.prod.outlook.com

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