ALSA: hda - Use auto-parser for HP laptops with cx20459 codec

These laptops can work well with the auto-parser and their BIOS setups,
and in addition, the auto-parser fixes the problem with S3/S4 where
the unsol event handling is killed after resume due to fallback to the
single-cmd mode.

Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=740115

Cc: <stable@kernel.org> [v3.1+]
Signed-off-by: Takashi Iwai <tiwai@suse.de>