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/drivers/isdn/capi/Kconfig b/drivers/isdn/capi/Kconfig
index c921d6c..c92f9d7 100644
--- a/drivers/isdn/capi/Kconfig
+++ b/drivers/isdn/capi/Kconfig
@@ -17,7 +17,7 @@
 	help
 	  If you say Y here, the kernelcapi driver can make verbose traces
 	  of CAPI messages. This feature can be enabled/disabled via IOCTL for
-	  every controler (default disabled).
+	  every controller (default disabled).
 	  This will increase the size of the kernelcapi module by 20 KB.
 	  If unsure, say Y.