ALSA: Add support of AudioScience ASI boards

Added the support of AudioScience ASI boards.
The driver has been tested for years on alsa-driver external tree,
now finally got merged to the kernel.

Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index bfcbbf8..dc681ba 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -227,6 +227,16 @@
 
     The power-management is supported.
 
+  Module snd-asihpi
+  -----------------
+
+    Module for AudioScience ASI soundcards
+
+    enable_hpi_hwdep	- enable HPI hwdep for AudioScience soundcard
+
+    This module supports multiple cards.
+    The driver requires the firmware loader support on kernel.
+
   Module snd-atiixp
   -----------------