ALSA: hda - Add tyan model for Realtek ALC262

The Realtek ALC262 on the Tyan Thunder n6650W (S2915-E) mainboard has a
rather odd configuration template. As a result, the white AUX connector
can not be used. This rewrites the default config to more accurately
reflect the connector layout, colour and function.
Unfortunately the black CD_IN connector, which is suspected to be widget
0x1c refuses to switch into input (0x20), instead opting to remain on 0x0.
As such, no mixer controls are exposed for it. Autoswitching is implemented
between the front headphone output and back line output.

Signed-off-by: Tony Vroon <tony@linx.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>