media: cedrus: Add missing v4l2_ctrl_request_hdl_put()

The check for a required control in the request was missing a call to
v4l2_ctrl_request_hdl_put() in the error path. Fix it.

Fixes: 50e76151 ("media: platform: Add Cedrus VPU decoder driver")
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>