name unnamed struct within HsaMemMapFlagd union

For aligning with RT definitions

Change-Id: I4dca0c5818fdcea6c596a48c7516835fc595a289
Signed-off-by: Yair Shachar <Yair.Shachar@amd.com>

include/hsakmttypes.h

@@ -493,7 +493,7 @@ typedef struct _HsaMemMapFlags
 						  // data from the memory, reduces latency
 						  // “cleanup hint” only, may be ignored
             unsigned int Reserved       : 23;
-        };
+        } ui32;
         HSAuint32 Value;
     };
 } HsaMemMapFlags;