powerpc/83xx: Update sdhci nodes per new bindings

As of commit 404614728f ("Update FSL
esdhc binding"), we use "fsl,esdhc" compatible entry as a base
match. U-Boot will use the same compatible to fixup esdhc nodes.

This patch updates 83xx dts files so that they conform to the new
bindings.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/mpc8378_mds.dts

@@ -155,7 +155,7 @@
 			};
 
 			sdhci@2e000 {
-				compatible = "fsl,mpc8378-esdhc", "fsl,mpc8379-esdhc";
+				compatible = "fsl,mpc8378-esdhc", "fsl,esdhc";
 				reg = <0x2e000 0x1000>;
 				interrupts = <42 0x8>;
 				interrupt-parent = <&ipic>;