arm64: dts: rockchip: Fix imx258 variant on pinephone pro

arm64: dts: rockchip: Fix imx258 variant on pinephone pro

imx258 had the driver updated a while back and it introduced
two variants, the imx258 and imx258-pdaf. The pinephone pro
is using the pdaf variant so this switches it to the correct
variant and eliminates the pdaf pixels from the sensor output
resulting in a much cleaner image.

Signed-off-by: Luis Garcia <git@luigi311.com>
Link: https://patch.msgid.link/20260119010633.3447863-1-git@luigi311.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>