Fix typos in Documentation/: 'D'-'E'

This patch fixes typos in various Documentation txts. This patch addresses
some words starting with the letters 'D'-'E'.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/usb/error-codes.txt b/Documentation/usb/error-codes.txt
index 39c68f8..6711441 100644
--- a/Documentation/usb/error-codes.txt
+++ b/Documentation/usb/error-codes.txt
@@ -126,7 +126,7 @@
 			urb->transfer_flags.
 
 -ENODEV			Device was removed.  Often preceded by a burst of
-			other errors, since the hub driver does't detect
+			other errors, since the hub driver doesn't detect
 			device removal events immediately.
 
 -EXDEV			ISO transfer only partially completed