ARM: dts: cubox-i: disable spread-spectrum for Cubox-i eSATA

Spread-spectrum doesn't work with Cubox-i hardware.  eSATA devices are
detected, but then fail on normal IO.  Therefore, disable this feature.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

arch/arm/boot/dts/imx6q-cubox-i.dts

@@ -16,4 +16,5 @@ &sata {
 	fsl,transmit-level-mV = <1104>;
 	fsl,transmit-boost-mdB = <0>;
 	fsl,transmit-atten-16ths = <9>;
+	fsl,no-spread-spectrum;
 };