media: staging: rkisp1: remove declaration of unimplemented function 'rkisp1_params_isr_handler'

The file rkisp1-common.h has a function declarion
'rkisp1_params_isr_handler' that is not implemented.
Remove it.

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>