perf kvm: Use evlist layer api when possible

No need for layer violations when a proper evlist api is available.

Signed-off-by: Igor Lubashev <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Link: http://lore.kernel.org/lkml/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/builtin-kvm.c

···
 			done = perf_kvm__handle_stdin();
 
 		if (!rc && !done)
-			err = fdarray__poll(fda, 100);
+			err = evlist__poll(kvm->evlist, 100);
 	}
 
 	evlist__disable(kvm->evlist);