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/mmc/item_updater_mmc.hpp b/mmc/item_updater_mmc.hpp
index 47ebd5d..2ef77e4 100644
--- a/mmc/item_updater_mmc.hpp
+++ b/mmc/item_updater_mmc.hpp
@@ -16,7 +16,7 @@
     virtual ~GardResetMMC() = default;
 
     /**
-     * @brief GARD factory reset - clears the PNOR GARD partition.
+     * @brief GUARD factory reset - clears the PNOR GUARD partition.
      */
     void reset() override;