ARM: dts: omap3-gta04: fix typo in backlight pins node name

mn -> nm for backlight_pins
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

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

@@ -220,7 +220,7 @@ OMAP3_CORE1_IOPAD(0x214e, PIN_INPUT_PULLUP | MUX_MODE0)		/* sdmmc1_dat3.sdmmc1_d
 		>;
 	};
 
-	backlight_pins: backlight_pins_pimnux {
+	backlight_pins: backlight_pins_pinmux {
 		pinctrl-single,pins = <
 			OMAP3_CORE1_IOPAD(0x20ba, MUX_MODE3)		/* gpt11/gpio57 */
 		>;