ALSA: hda/realtek: fix mute/micmute LED for HP mt645 G8

ALSA: hda/realtek: fix mute/micmute LED for HP mt645 G8

The HP Elite mt645 G8 Mobile Thin Client uses an ALC236 codec
and needs the ALC236_FIXUP_HP_MUTE_LED_MICMUTE_VREF quirk
to enable the mute and micmute LED functionality.

This patch adds the system ID of the HP Elite mt645 G8
to the `alc269_fixup_tbl` in `patch_realtek.c`
to enable the required quirk.

Cc: stable@vger.kernel.org
Signed-off-by: Nikolai Afanasenkov <nikolai.afanasenkov@hp.com>
Link: https://patch.msgid.link/20240916195042.4050-1-nikolai.afanasenkov@hp.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>