Fix some typos in Documentation/: 'A'

This patch fixes typos in various Documentation txts.
This patch addresses some words starting with the letter 'A'.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/networking/dl2k.txt b/Documentation/networking/dl2k.txt
index d460492..a3a3c6e 100644
--- a/Documentation/networking/dl2k.txt
+++ b/Documentation/networking/dl2k.txt
@@ -173,7 +173,7 @@
 
 Parameter Description
 =====================
-You can install this driver without any addtional parameter. However, if you
+You can install this driver without any additional parameter. However, if you
 are going to have extensive functions then it is necessary to set extra
 parameter. Below is a list of the command line parameters supported by the
 Linux device