trivial code style cleanup round 2

src/systemcmds/perf/perf.c

@@ -68,11 +68,13 @@ int perf_main(int argc, char *argv[])
 		if (strcmp(argv[1], "reset") == 0) {
 			perf_reset_all();
 			return 0;
+
 		} else if (strcmp(argv[1], "latency") == 0) {
 			perf_print_latency(0 /* stdout */);
 			fflush(stdout);
 			return 0;
 		}
+
 		printf("Usage: perf [reset | latency]\n");
 		return -1;
 	}