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: Ia7dbb04ead7565d63437a5878fd8a543029d9a93
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/platform-mc/test/platform_manager_test.cpp b/platform-mc/test/platform_manager_test.cpp
index 73baa1a..0d66a0b 100644
--- a/platform-mc/test/platform_manager_test.cpp
+++ b/platform-mc/test/platform_manager_test.cpp
@@ -170,7 +170,7 @@
             0x1,
             0x0,  // Entity instance number =1
             0,
-            0,    // Overal system
+            0,    // Overall system
             0,    // shared Name Count one name only
             01,   // nameStringCount
             0x65, 0x6e, 0x00,
@@ -329,7 +329,7 @@
             0x1,
             0x0,  // Entity instance number =1
             0,
-            0,    // Overal system
+            0,    // Overall system
             0,    // shared Name Count one name only
             01,   // nameStringCount
             0x65, 0x6e, 0x00,