ARM: dts: Fix ldp gpio keys to use defines

Fix ldp gpio keys to use defines.
Signed-off-by: NTony Lindgren <tony@atomide.com>

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

@@ -34,63 +34,63 @@
 		key_enter {
 			label = "enter";
 			gpios = <&gpio4 5 GPIO_ACTIVE_LOW>; /* gpio101 */
-			linux,code = <0x0107001c>; /* KEY_ENTER */
+			linux,code = <KEY_ENTER>;
 			gpio-key,wakeup;
 		};
 
 		key_f1 {
 			label = "f1";
 			gpios = <&gpio4 6 GPIO_ACTIVE_LOW>; /* gpio102 */
-			linux,code = <0x0303003b>; /* KEY_F1 */
+			linux,code = <KEY_F1>;
 			gpio-key,wakeup;
 		};
 
 		key_f2 {
 			label = "f2";
 			gpios = <&gpio4 7 GPIO_ACTIVE_LOW>; /* gpio103 */
-			linux,code = <0x0403003c>; /* KEY_F2 */
+			linux,code = <KEY_F2>;
 			gpio-key,wakeup;
 		};
 
 		key_f3 {
 			label = "f3";
 			gpios = <&gpio4 8 GPIO_ACTIVE_LOW>; /* gpio104 */
-			linux,code = <0x0503003d>; /* KEY_F3 */
+			linux,code = <KEY_F3>;
 			gpio-key,wakeup;
 		};
 
 		key_f4 {
 			label = "f4";
 			gpios = <&gpio4 9 GPIO_ACTIVE_LOW>; /* gpio105 */
-			linux,code = <0x0704003e>; /* KEY_F4 */
+			linux,code = <KEY_F4>;
 			gpio-key,wakeup;
 		};
 
 		key_left {
 			label = "left";
 			gpios = <&gpio4 10 GPIO_ACTIVE_LOW>; /* gpio106 */
-			linux,code = <0x04070069>; /* KEY_LEFT */
+			linux,code = <KEY_LEFT>;
 			gpio-key,wakeup;
 		};
 
 		key_right {
 			label = "right";
 			gpios = <&gpio4 11 GPIO_ACTIVE_LOW>; /* gpio107 */
-			linux,code = <0x0507006a>; /* KEY_RIGHT */
+			linux,code = <KEY_RIGHT>;
 			gpio-key,wakeup;
 		};
 
 		key_up {
 			label = "up";
 			gpios = <&gpio4 12 GPIO_ACTIVE_LOW>; /* gpio108 */
-			linux,code = <0x06070067>; /* KEY_UP */
+			linux,code = <KEY_UP>;
 			gpio-key,wakeup;
 		};
 
 		key_down {
 			label = "down";
 			gpios = <&gpio4 13 GPIO_ACTIVE_LOW>; /* gpio109 */
-			linux,code = <0x0707006c>; /* KEY_DOWN */
+			linux,code = <KEY_DOWN>;
 			gpio-key,wakeup;
 		};
 	};