arm: octeontx2: cn9130-crb.dtsi: Disable eth2 for now

Because of the incorrectly supported SGMII_2500 mode, this patch
disables eth2 for now until this issue will be fixed in mainline.

Also fix an incorrect comment.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Konstantin Porotchkin <kostap@marvell.com>
Cc: Stefan Chulski <stefanc@marvell.com>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Marek Behun <marek.behun@nic.cz>

arch/arm/dts/cn9130-crb.dtsi

@@ -238,7 +238,6 @@
 };
 
 &cp0_eth0 {
-	/* Disable it for now, as mainline does not support this IF yet */
 	status = "okay";
 	phy-mode = "sfi";
 };
@@ -253,7 +252,6 @@
 
 &cp0_eth2 {
 	/* Disable it for now, as mainline does not support this IF yet */
-	status = "okay";
+	status = "disabled";
 	phy = <&nbaset_phy0>;
-	phy-mode = "sgmii-2500";
 };