ARM: imx6q-arm2: Remove hardcoded mac address

Do not hardcode the local mac address.

Let bootloader retrieve it.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6q-arm2.dts

@@ -25,7 +25,6 @@ soc {
 		aips-bus@02100000 { /* AIPS2 */
 			ethernet@02188000 {
 				phy-mode = "rgmii";
-				local-mac-address = [00 04 9F 01 1B 61];
 				status = "okay";
 			};