Fixed UART test warning with volatile

software/common/validation/uart_tests.c

@@ -952,7 +952,7 @@ int uart2_interrupt_test(void){
   int return_val=0;
   int err_code=0;
   int i;
-  char ctmp; /* dummy variable for overflow test (data can be corrupted so it is not checked) */
+  char volatile ctmp; /* dummy variable for overflow test (data can be corrupted so it is not checked) */
 
 
   puts ("UART 2 interrupt connectivity test");