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: I014e7670ca4ba57f7e1b80e96c001474cf7a6676
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/item_updater.hpp b/item_updater.hpp
index 0aa3a5d..40cdcd2 100644
--- a/item_updater.hpp
+++ b/item_updater.hpp
@@ -35,7 +35,7 @@
 constexpr static auto volatilePath = "/org/open_power/control/volatile";
 
 /** @class GardReset
- *  @brief OpenBMC GARD factory reset implementation.
+ *  @brief OpenBMC GUARD factory reset implementation.
  *  @details An implementation of xyz.openbmc_project.Common.FactoryReset under
  *  /org/openpower/control/gard.
  */
@@ -56,7 +56,7 @@
     virtual ~GardReset() {}
 
     /**
-     * @brief GARD factory reset - clears the PNOR GARD partition.
+     * @brief GUARD factory reset - clears the PNOR GUARD partition.
      */
     virtual void reset() = 0;