ARM: dts: gta04: improve panel compatibility string

Official vendor string is now "tpo" and not "toppoly".

Requires patch "omapdrm: panel: fix compatible vendor string for td028ttec1"
so that the driver understands both.
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

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

@@ -86,7 +86,7 @@ spi_lcd {
 
 		/* lcd panel */
 		lcd: td028ttec1@0 {
-			compatible = "toppoly,td028ttec1";
+			compatible = "tpo,td028ttec1";
 			reg = <0>;
 			spi-max-frequency = <100000>;
 			spi-cpol;