media: hantro: fix extra MV/MC sync space calculation

Add space for MVs and MC sync data to the capture buffers depending on
whether the post processor will be enabled for the new capture format
passed to TRY_FMT, not the currently set capture format.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-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>