media: MAINTAINERS: add Dafna Hirschfeld for rkisp1

Add Dafna Hirschfeld to rkisp1 maintainers list

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Acked-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Author: Helen Koike

MAINTAINERS

@@ -14858,6 +14858,7 @@ F:	include/linux/hid-roccat*
 
 ROCKCHIP ISP V1 DRIVER
 M:	Helen Koike <helen.koike@collabora.com>
+M:	Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
 L:	linux-media@vger.kernel.org
 S:	Maintained
 F:	drivers/staging/media/rkisp1/