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/dell_rbu.txt b/Documentation/dell_rbu.txt
index 941343a..fb18c5d 100644
--- a/Documentation/dell_rbu.txt
+++ b/Documentation/dell_rbu.txt
@@ -4,7 +4,7 @@
 
 Scope:
 This document discusses the functionality of the rbu driver only.
-It does not cover the support needed from aplications to enable the BIOS to
+It does not cover the support needed from applications to enable the BIOS to
 update itself with the image downloaded in to the memory.
 
 Overview: