media: staging: rkisp1: change type of fields in 'rkisp1_cif_isp_lsc_config' from u32 to u16

The fields in struct 'rkisp1_cif_isp_lsc_config' need to hold
values of 12 bits, therefore it is enough to declare them as u16.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>