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: I539a0c5baa63be240fc1c76367c0af338dd89c7b
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/libpldmresponder/platform_state_effecter.hpp b/libpldmresponder/platform_state_effecter.hpp
index 201b283..106cbc1 100644
--- a/libpldmresponder/platform_state_effecter.hpp
+++ b/libpldmresponder/platform_state_effecter.hpp
@@ -32,7 +32,7 @@
  *  @param[in] stateField - The state field data for each of the states,
  * equal to composite effecter count in number
  *  @return - Success or failure in setting the states. Returns failure in
- * terms of PLDM completion codes if atleast one state fails to be set
+ * terms of PLDM completion codes if at least one state fails to be set
  */
 template <class DBusInterface, class Handler>
 int setStateEffecterStatesHandler(