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/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 30b9050..42d481d 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -1677,7 +1677,7 @@ int osd_finalize_request(struct osd_request *or,
 		}
 	} else {
 		/* TODO: I think that for the GET_ATTR command these 2 should
-		 * be reversed to keep them in execution order (for embeded
+		 * be reversed to keep them in execution order (for embedded
 		 * targets with low memory footprint)
 		 */
 		ret = _osd_req_finalize_set_attr_list(or);