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: Iae81201889d1bb4ca324243b863948cb60420ae7
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/vpd_exceptions.hpp b/vpd_exceptions.hpp
index bcfd366..c0f84e8 100644
--- a/vpd_exceptions.hpp
+++ b/vpd_exceptions.hpp
@@ -10,7 +10,7 @@
 {
 
 /** @class VPDException
- * @brief This class inherits std::runtime_error and overrrides
+ * @brief This class inherits std::runtime_error and overrides
  * "what" method to return the description of exception.
  * This class also works as base class for custom exception
  * classes of openpower-vpd repository.