ARM: dts: omap3-gta04: Fix magnetometer model

gta04 is using hmc5883l not hmc5843 so fix wrong compatible
entry.
Signed-off-by: Marek Belisko <marek@goldelico.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

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

@@ -220,7 +220,7 @@ gta04_led4: green_power@4 {
 
 	/* compass aka magnetometer */
 	hmc5843@1e {
-		compatible = "honeywell,hmc5843";
+		compatible = "honeywell,hmc5883l";
 		reg = <0x1e>;
 	};