Fix spelling mistakes using codespell

This commit corrects various spelling mistakes throughout the
repository. The corrections were made automatically using `codespell`[1]
tool.

[1]: https://github.com/codespell-project/codespell

Change-Id: Ifde736cdcf3ccca19b9e65afac69018628a19631
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/src/speed_select.cpp b/src/speed_select.cpp
index d393e4a..b4f4890 100644
--- a/src/speed_select.cpp
+++ b/src/speed_select.cpp
@@ -299,7 +299,7 @@
 
     /**
      * Emit the interface added signals which were deferred. This is required
-     * for ObjectMapper to pick up the objects, if we initially defered the
+     * for ObjectMapper to pick up the objects, if we initially deferred the
      * signal emitting.
      */
     void finalize()