perf tools: Change my maintainer address

Also remove old snail mail address from CREDITS, moved years ago.

LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 8e6548d..f94cd37 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4602,7 +4602,7 @@
 M:	Peter Zijlstra <a.p.zijlstra@chello.nl>
 M:	Paul Mackerras <paulus@samba.org>
 M:	Ingo Molnar <mingo@elte.hu>
-M:	Arnaldo Carvalho de Melo <acme@redhat.com>
+M:	Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
 S:	Supported
 F:	kernel/perf_event*.c
 F:	include/linux/perf_event.h