scripts/spelling.txt: add "embeded" pattern and fix typo instances

Fix typos and add the following to the scripts/spelling.txt:

  embeded||embedded

Link: http://lkml.kernel.org/r/1481573103-11329-12-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/scripts/spelling.txt b/scripts/spelling.txt
index f445fea..276da42 100644
--- a/scripts/spelling.txt
+++ b/scripts/spelling.txt
@@ -386,6 +386,7 @@
 ehther||ether
 eigth||eight
 eletronic||electronic
+embeded||embedded
 enabledi||enabled
 enchanced||enhanced
 encorporating||incorporating