media: staging: rkisp1: params: use rkisp1_param_set_bits to set reg in isr

replace a read and write of RKISP1_CIF_ISP_CTRL register
in the isr with the 'rkisp1_param_set_bits' function
that does that.

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>