Add support for MISRA rule 20.7 (#546)

Misra rule 20.7 requires parenthesis to all parameter names
in macro definitions.

The issue was reported here : https://forums.freertos.org/t/misra-20-7-compatibility/15385

.github/workflows/unit-tests.yml

@@ -24,7 +24,7 @@ jobs:
 
     - name: Install packages
       run: |
-          sudo apt-get install lcov cflow ruby doxygen build-essential
+          sudo apt-get install lcov cflow ruby doxygen build-essential unifdef
     - name: Run Unit Tests with ENABLE_SANITIZER=1
       run: |
           make -C FreeRTOS/Test/CMock clean