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/Documentation/pnp.txt b/Documentation/pnp.txt
index 28037aa..481faf5 100644
--- a/Documentation/pnp.txt
+++ b/Documentation/pnp.txt
@@ -140,7 +140,7 @@
 Requirements for a Linux PnP protocol:
 1.) the protocol must use EISA IDs
 2.) the protocol must inform the PnP Layer of a devices current configuration
-- the ability to set resources is optional but prefered.
+- the ability to set resources is optional but preferred.
 
 The following are PnP protocol related functions: