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>

Documentation/video4linux/w9968cf.txt

@@ -15,7 +15,7 @@ Index
 5.  Supported devices
 6.  Module dependencies
 7.  Module loading
-8.  Module paramaters
+8.  Module parameters
 9.  Contact information
 10. Credits