ALSA: hda - Fix the white noise on Dell laptop

Dell laptop causes the white noise by login screen and headphone,
and the fixup function ALC292_FIXUP_DISABLE_AAMIX can eliminate this
noise.

Codec: Realtek ALC3235
Vendor Id: 0x10ec0293
Subsystem Id: 0x102806db

Cc: <stable@vger.kernel.org>
BugLink: https://bugs.launchpad.net/bugs/1484334


Signed-off-by: Woodrow Shen <woodrow.shen@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>