board: MIMXRT1062-FMURT6: Set CANFD bus-speed-data

Set the flexcan3 bus-speed-data to allow for correct CANFD data-speed.

Signed-off-by: Benjamin Perseghetti <bperseghetti@rudislabs.com>

boards/arm/mimxrt1062_fmurt6/mimxrt1062_fmurt6.dts

@@ -142,6 +142,7 @@
 	pinctrl-0 = <&pinmux_flexcan3>;
 	pinctrl-names = "default";
 	bus-speed = <125000>;
+	bus-speed-data = <1000000>;
 	can-transceiver {
 		max-bitrate = <5000000>;
 	};