media: ti-vpe: cal: handle cal_ctx_v4l2_register error

commit ae6f8c3364f0334dd9c798b857dcf40e44866460 from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git



cal_async_notifier_complete() doesn't handle errors returned from
cal_ctx_v4l2_register(). Add the error handling.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>