[ALSA] Add hp-bpc model type for HP laptops

Added 'hp-bpc' model type for HP xw4400-compatible laptops.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 74ea66d3..c595acb 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -798,6 +798,7 @@
 
 	ALC262
 	  fujitsu	Fujitsu Laptop
+	  hp-bpc	HP xw4400/6400/8400/9400 laptops
 	  basic		fixed pin assignment w/o SPDIF
 	  auto		auto-config reading BIOS (default)