resolving c++ linter

Disable the build/include_subdir check

Author: ruck314

CPPLINT.cfg

@@ -14,5 +14,9 @@ filter=-legal/copyright
 filter=-build/header_guard
 
 # Disable the readability/casting check
-# Because we are using C code in the kernel driver (no C++)
+# Because we are using C code
 filter=-readability/casting
+
+# Disable the build/include_subdir check
+# Because headers are organized in same directory and C code
+filter=-build/include_subdir