Improve the return value for hsaKmtOpenKFD()

When KFD is already opened, Opening it again should return
HSAKMT_STATUS_KERNEL_ALREADY_OPENED to align with the specification.

Change-Id: Ib10a2d2c48781600bea7d072557d03ccb1a2bc19
Signed-off-by: Yong Zhao <yong.zhao@amd.com>

src/openclose.c

@@ -146,7 +146,7 @@ HSAKMT_STATUS HSAKMTAPI hsaKmtOpenKFD(void)
 		init_counter_props(sys_props.NumNodes);
 	} else {
 		kfd_open_count++;
-		result = HSAKMT_STATUS_SUCCESS;
+		result = HSAKMT_STATUS_KERNEL_ALREADY_OPENED;
 	}
 
 	pthread_mutex_unlock(&hsakmt_mutex);