amdkfd: Trim off unnescessary semicolon from kfd_packet_manager.c

Found-By: Coccinelle
Signed-off-by: Edward O'Callaghan <[e-mail]>
Signed-off-by: Oded Gabbay <[e-mail]>

drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c

···
 	default:
 		BUG();
 		break;
-	};
+	}
 
 	pm->priv_queue->ops.submit_packet(pm->priv_queue);