dts: mvebu: mcbin: drop redundant SD slot node

Commit 61dccf73 (dts: mvebu: a80x0: Enable SD/eMMC interfaces) added
a redundant DT node for SD card slot. Drop it.

Cc: Konstantin Porotchkin <kostap@marvell.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Stefan Roese <sr@denx.de>

arch/arm/dts/armada-8040-mcbin.dts

@@ -154,14 +154,6 @@
 	status = "okay";
 };
 
-/* uSD slot */
-&cpm_sdhci0 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&cpm_sdhci_pins>;
-	bus-width = <4>;
-	status = "okay";
-};
-
 &cpm_comphy {
 	/*
 	 * CP0 Serdes Configuration: