MAINTAINERS: Add Mailing list and Web-page for PERFORMANCE EVENTS SUBSYSTEM

Add entry "L: linux-perf-users@vger.kernel.org" to archive the
related mail on https://lore.kernel.org/linux-perf-users/, add
entry "W: https://perf.wiki.kernel.org/" so that newbies could
get some useful materials.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/1615780592-21838-1-git-send-email-yangtiezhu@loongson.cnSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

MAINTAINERS

@@ -14020,8 +14020,10 @@ R:	Mark Rutland <mark.rutland@arm.com>
 R:	Alexander Shishkin <alexander.shishkin@linux.intel.com>
 R:	Jiri Olsa <jolsa@redhat.com>
 R:	Namhyung Kim <namhyung@kernel.org>
+L:	linux-perf-users@vger.kernel.org
 L:	linux-kernel@vger.kernel.org
 S:	Supported
+W:	https://perf.wiki.kernel.org/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core
 F:	arch/*/events/*
 F:	arch/*/events/*/*