ALSA: hda: Added an ALC888 model entry for Fujitsu-Siemens Amilo Xa3530

ALSA: hda: Added an ALC888 model entry for Fujitsu-Siemens Amilo Xa3530

This patch fixes the bug 0004240: ALC888 - Intel HDA - Headphone Controlling.
It is made against the 2008-11-23 snapshot.

Added Realtek ALC888 model entry for the Fujitsu-Siemens Amilo Xa3530
laptop. It has 4 jacks: HP out, Mic-in, Line-in and Line-out/Side/SPDIF
(this one is on the laptop side, the other ones are on the rear).

Model detection works.
Headphone jack sense works now.
Front mic works now, was same as Acer Aspire 4930G.
Added channel mode from 2 to 8 channels.

In 2ch and 4ch modes, the front is also sent to the Line-out/side jack
for convenience instead of just muting the Line-out/side jack like other
models do.

When using the Mic-in jack as CLFE, the sound is very low (bug?). To
work it around, in 6ch mode the CLFE channel is duplicated to the
Line-out/side jack because this one has a better amp.

Cc: manu@frogged.de
Signed-off-by: Vincent Petry <PVince81@yahoo.fr>
Signed-off-by: Takashi Iwai <tiwai@suse.de>