ARM: dts: imx6sx: Remove LDB endpoint

Remove the LDB endpoint description from the common imx6sx.dtsi
as it causes regression for boards that has the LCDIF connected
directly to a parallel display.

Let the LDB endpoint be described in the board devicetree file
instead.

Cc: stable@vger.kernel.org
Fixes: b74edf62 ("ARM: dts: imx6sx: Add LDB support")
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/nxp/imx/imx6sx.dtsi

@@ -863,7 +863,6 @@ port@0 {
 							reg = <0>;
 
 							ldb_from_lcdif1: endpoint {
-								remote-endpoint = <&lcdif1_to_ldb>;
 							};
 						};
 
@@ -1309,11 +1308,8 @@ lcdif1: lcdif@2220000 {
 					power-domains = <&pd_disp>;
 					status = "disabled";
 
-					ports {
 					port {
 						lcdif1_to_ldb: endpoint {
-								remote-endpoint = <&ldb_from_lcdif1>;
-							};
 						};
 					};
 				};