ARM: dts: omap3-gta04: declare backlight in lcd node

The lcd display of the gta04 has a backlight but the backlight
was not referenced in the lcd node, so screen blanking did
not turn off the backlight. Fix that.

Signed-off-by: Andreas Kemnade <[e-mail]>
Tested-by: H. Nikolaus Schaller <[e-mail]>
Signed-off-by: Tony Lindgren <[e-mail]>

arch/arm/boot/dts/omap3-gta04.dtsi

···
 			spi-cpol;
 			spi-cpha;
 
+			backlight= <&backlight>;
 			label = "lcd";
 			port {
 				lcd_in: endpoint {
···
 		};
 	};
 
-	backlight {
+	backlight: backlight {
 		compatible = "pwm-backlight";
 		pwms = <&pwm11 0 12000000 0>;
 		pwm-names = "backlight";