perf tools: Add support for PERF_RECORD_MISC_GUEST_USER in thread__find_addr_map().

This patch remove a TODO in thread__find_addr_map() and add support of
PERF_RECORD_MISC_GUEST_USER.
Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Link: http://lkml.kernel.org/r/3dd652201171a19c910b500984c7c3590e77603b.1387572416.git.yangds.fnst@cn.fujitsu.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/event.c

@@ -659,14 +659,9 @@ void thread__find_addr_map(struct thread *thread,
 		al->level = 'g';
 		mg = &machine->kmaps;
 		load_map = true;
-	} else {
-		/*
-		 * 'u' means guest os user space.
-		 * TODO: We don't support guest user space. Might support late.
-		 */
-		if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
+	} else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
 		al->level = 'u';
-		else
+	} else {
 		al->level = 'H';
 		al->map = NULL;