MAINTAINERS: ksmbd: switch Sergey to reviewer

Sergey don't have the time to work ksmbd. He will continue to review
ksmbd works at free time. This patch switches him from maintainer
to reviewer.

Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: namjaejeon

MAINTAINERS

@@ -10468,9 +10468,9 @@ F:	tools/testing/selftests/
 
 KERNEL SMB3 SERVER (KSMBD)
 M:	Namjae Jeon <linkinjeon@kernel.org>
-M:	Sergey Senozhatsky <senozhatsky@chromium.org>
 M:	Steve French <sfrench@samba.org>
 M:	Hyunchul Lee <hyc.lee@gmail.com>
+R:	Sergey Senozhatsky <senozhatsky@chromium.org>
 L:	linux-cifs@vger.kernel.org
 S:	Maintained
 T:	git git://git.samba.org/ksmbd.git