perf c2c report: Iterate node display in browser

Adding TUI support to switch between Node entry versions
in real time with 'n' key.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-xqbw4h4dxig54wff7fd14lao@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-c2c.c

@@ -2207,6 +2207,10 @@ static int perf_c2c__browse_cacheline(struct hist_entry *he)
 		case 's':
 			c2c.symbol_full = !c2c.symbol_full;
 			break;
+		case 'n':
+			c2c.node_info = (c2c.node_info + 1) % 3;
+			setup_nodes_header();
+			break;
 		case 'q':
 			goto out;
 		default: