dt-bindings: phy: rockchip-inno-csi-dphy: add rk3588 variant

The Rockchip RK3588 variant of the CSI-2 DPHY features two reset lines.
Add the variant and allow for the additional reset.

While at it, fix the description of the first reset in order to avoid
confusion.

Signed-off-by: Michael Riesch <michael.riesch@collabora.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250616-rk3588-csi-dphy-v4-3-a4f340a7f0cf@collabora.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>