rockchip: video: mipi: add more compatible strings for rk3288/rk3399

The rk3288/RK3399 DT synced from Linux contains some different
compatible strings in the mipi node then origanal used in U-boot.
Allow both options to be backwards compatible and to be able
to handle recent rk3288.dtsi and rk3399.dtsi files.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>