boards: shields: nxp_btb44_ov5640: Add some endpoint properties

The ov5640 camera driver now supports both MIPI CSI2 (DPHY) and DVP
modes. It is in MIPI CSI2 mode in this overlay. Add bus-type property
for this. In this mode, data-lanes property is required as well.

Signed-off-by: Phi Bang Nguyen <phibang.nguyen@nxp.com>