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/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt
index e80e036..bfcd95d 100644
--- a/Documentation/powerpc/booting-without-of.txt
+++ b/Documentation/powerpc/booting-without-of.txt
@@ -335,7 +335,7 @@
      "compact" format for the tree itself that is however not backward
      compatible. You should always generate a structure of the highest
      version defined at the time of your implementation. Currently
-     that is version 16, unless you explicitely aim at being backward
+     that is version 16, unless you explicitly aim at being backward
      compatible.
 
    - last_comp_version