ARM: dts: imx6dl-yapp4: Remove the unused white LED channel

Since the reg property was added to each channel node in commit
b86d3d21cd4c ("ARM: dts: imx6dl-yapp4: Add reg property to the lp5562
channel node") it is possible to skip unused channels.

Remove the actually unused white LED channel.

Signed-off-by: Michal Vokáč <[e-mail]>
Acked-by: Pavel Machek <[e-mail]>
Reviewed-by: Fabio Estevam <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx6dl-yapp4-common.dtsi

···
 			reg = <2>;
 			color = <LED_COLOR_ID_BLUE>;
 		};
-
-		chan@3 {
-			chan-name = "W";
-			led-cur = /bits/ 8 <0x0>;
-			max-cur = /bits/ 8 <0x0>;
-			reg = <3>;
-			color = <LED_COLOR_ID_WHITE>;
-		};
 	};
 
 	eeprom@57 {