MAINTAINERS: drm/hisilicon: Drop Chen Feng

The listed address doesn't work any more:

  puck.chen@hisilicon.com
    host mx5.hisilicon.com [124.71.93.234]
    SMTP error from remote mail server after RCPT TO:<puck.chen@hisilicon.com>:
    551 5.1.1 <puck.chen@hisilicon.com>: Recipient address rejected:
    Failed recipient validation check.: host 127.0.0.1[127.0.0.1] said:
    554 5.7.1 recipient verify from ldap failed (in reply to RCPT TO command)
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221219085307.1403247-1-u.kleine-koenig@pengutronix.de

MAINTAINERS

@@ -6930,7 +6930,6 @@ M:	Xinliang Liu <xinliang.liu@linaro.org>
 M:	Tian Tao  <tiantao6@hisilicon.com>
 R:	John Stultz <jstultz@google.com>
 R:	Xinwei Kong <kong.kongxinwei@hisilicon.com>
-R:	Chen Feng <puck.chen@hisilicon.com>
 L:	dri-devel@lists.freedesktop.org
 S:	Maintained
 T:	git git://anongit.freedesktop.org/drm/drm-misc