gcc error when const is used

Change to #define to be compatible with gcc.

Change-Id: Id2a2b3dbeaaf7aea9b0e2075320c30f8bad50fc7


[ROCm/rdc commit: 73d8b35610]

projects/rdc/include/rdc/rdc.h

@@ -431,7 +431,7 @@ typedef enum {
 /**
  * @brief The maximum test cases to run
  */
-const uint32_t MAX_TEST_CASES =  RDC_DIAG_TEST_LAST - RDC_DIAG_TEST_FIRST + 1;
+#define MAX_TEST_CASES  (RDC_DIAG_TEST_LAST - RDC_DIAG_TEST_FIRST + 1)
 
 /**
  * @brief The maximum length of the diagnostic messages