Fix smatch error:
drivers/media/spi/cxd2880-spi.c:391 cxd2880_start_feed() warn: Please consider using kzalloc instead of kmalloc
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>