arm: dts: imx8mm-venice-gw700x: fix fifo-depth phy props

Replace the deprecated 'tx-fifo-depth' and 'rx-fifo-depth' properties
not supported by U-Boot drivers/net/phy/dp83867.c with the proper
'ti,fifo-depth' property.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/arch/arm/dts/imx8mm-venice-gw700x.dtsi b/arch/arm/dts/imx8mm-venice-gw700x.dtsi
index c769fad..cc850e7 100644
--- a/arch/arm/dts/imx8mm-venice-gw700x.dtsi
+++ b/arch/arm/dts/imx8mm-venice-gw700x.dtsi
@@ -111,8 +111,7 @@
 			reg = <0>;
 			ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 			ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
-			tx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
-			rx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
+			ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
 		};
 	};
 };