media: imx: fix boolreturn.cocci warning:

Fix following boolreturn.cocci warning:
./drivers/staging/media/imx/imx-media-csi.c:153:9-10: WARNING:
 return of 0/1 in function 'requires_passthrough' with return
type bool.

Signed-off-by: Guo Zhengkui <guozhengkui@vivo.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>