[C72][DTS][OVERLAY] add support for LVDS display
seco-imx8mn-c72-lvds-dual-156-overlay.dts for Innolux G156HCE-L01 15.6-inch seco-imx8mn-c72-lvds-dual-215-overlay.dts for AUO P215HCN 21.5-inch
seco-imx8mn-c72-lvds-dual-156-overlay.dts for Innolux G156HCE-L01 15.6-inch seco-imx8mn-c72-lvds-dual-215-overlay.dts for AUO P215HCN 21.5-inch