Fix typos in Documentation/: 'N'-'P'

This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letters 'N'-'P'.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/usb/usb-serial.txt b/Documentation/usb/usb-serial.txt
index eca85f3..2899628 100644
--- a/Documentation/usb/usb-serial.txt
+++ b/Documentation/usb/usb-serial.txt
@@ -272,7 +272,7 @@
   work under SMP with the uhci driver.
 
   The driver is generally working, though we still have a few more ioctls
-  to implement and final testing and debugging to do.  The paralled port
+  to implement and final testing and debugging to do.  The parallel port
   on the USB 2 is supported as a serial to parallel converter; in other
   words, it appears as another USB serial port on Linux, even though
   physically it is really a parallel port.  The Digi Acceleport USB 8