rdc_field_t replaces uint32_t; centralize field data

Make the RDC use the new rdc_field_t enum instead of uint32_t.
This will help prevent invalid field types from being passed in.

Also, centralize where data related to fields is kept. This will
reduce the number of places where changes are required each
time a new field is added.

Finally, cleaned up several cpplint issues.

Change-Id: I48e4512e18c164411d8b09ae3d4bed99fba359ec

include/rdc_lib/RdcCacheManager.h

@@ -19,8 +19,8 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */
-#ifndef RDC_LIB_RDCCACHEMANAGER_H_
-#define RDC_LIB_RDCCACHEMANAGER_H_
+#ifndef INCLUDE_RDC_LIB_RDCCACHEMANAGER_H_
+#define INCLUDE_RDC_LIB_RDCCACHEMANAGER_H_
 
 #include <memory>
 #include <utility>
@@ -36,13 +36,13 @@ namespace rdc {
 class RdcCacheManager {
  public:
     virtual rdc_status_t rdc_field_get_latest_value(uint32_t gpu_index,
-                uint32_t field, rdc_field_value* value) = 0;
+        rdc_field_t field, rdc_field_value* value) = 0;
     virtual rdc_status_t rdc_field_get_value_since(uint32_t gpu_index,
-                uint32_t field, uint64_t since_time_stamp,
+        rdc_field_t field, uint64_t since_time_stamp,
                 uint64_t *next_since_time_stamp, rdc_field_value* value) = 0;
     virtual rdc_status_t rdc_update_cache(uint32_t gpu_index,
                 const rdc_field_value& value) = 0;
-    virtual rdc_status_t evict_cache(uint32_t gpu_index, uint32_t field_id,
+    virtual rdc_status_t evict_cache(uint32_t gpu_index, rdc_field_t field_id,
                 uint64_t max_keep_samples, double  max_keep_age) = 0;
     virtual std::string  get_cache_stats() = 0;
 
@@ -69,4 +69,4 @@ typedef std::shared_ptr<RdcCacheManager> RdcCacheManagerPtr;
 }  // namespace rdc
 }  // namespace amd
 
-#endif  // RDC_LIB_RDCCACHEMANAGER_H_
+#endif  // INCLUDE_RDC_LIB_RDCCACHEMANAGER_H_