misc doc and kconfig typos

Fix various typos in kernel docs and Kconfigs, 2.6.21-rc4.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/sound/core/Kconfig b/sound/core/Kconfig
index b292752..829ca38 100644
--- a/sound/core/Kconfig
+++ b/sound/core/Kconfig
@@ -146,7 +146,7 @@
 	default y
 	help
 	  Say Y here to include code for verbose procfs contents (provides
-          usefull information to developers when a problem occurs). On the
+          useful information to developers when a problem occurs).  On the
           other side, it makes the ALSA subsystem larger.
 
 config SND_VERBOSE_PRINTK