Fixed compile warnings by adding volatile

software/common/demos/self_reset_demo.c

@@ -219,7 +219,7 @@ void main_prog_part_3(void)
 /* ----------------------------------------------------------------- */
 void HardFault_Handler(void)
 {
-  unsigned int dummy; /* dummy variable for read that trigger hardfault */
+  unsigned int volatile dummy; /* dummy variable for read that trigger hardfault */
 
   puts("[Hard fault handler]");
   puts("- trigger fault again to enter lockup");

software/common/validation/default_slaves_tests.c

@@ -74,7 +74,7 @@ volatile int temp_data;
 int main (void)
 {
   int err_code = 0;
-  int rdata; /* dummy variable for read data in bus fault testing */
+  int volatile rdata; /* dummy variable for read data in bus fault testing */
 
   // UART init
   UartStdOutInit();