ARM: dts: imx6q-mccmon6: Add fsl,err006687-workaround-present property

Add property for ERR006687 hardware workaround.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6q-mccmon6.dts

@@ -103,6 +103,7 @@ &fec {
 	/delete-property/ interrupts;
 	interrupts-extended = <&gpio1 6 IRQ_TYPE_LEVEL_HIGH>,
 			      <&intc 0 119 IRQ_TYPE_LEVEL_HIGH>;
+	fsl,err006687-workaround-present;
 	status = "okay";
 };