media: staging: rkisp1: remove duplicate macro definition

The macro RKISP1_CIF_ISP_AWB_MODE_YCBCR_EN is defined twice.
Remove the second define.

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>