powerpc/83xx: Convert existing sdhc nodes to new bindings

- sdhc node renamed to sdhci ("sdhc" name is confusing since SDHC is
  used to name Secure Digital High Capacity cards, while SDHCI is an
  interface).

- Get rid of "fsl,esdhc" compatible entry, it's replaced by the
  "fsl,<chip>-esdhc" scheme;

- Get rid of `model' property.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/mpc8377_mds.dts

@@ -313,12 +313,13 @@
 			fsl,descriptor-types-mask = <0x3ab0ebf>;
 		};
 
-		sdhc@2e000 {
-			model = "eSDHC";
-			compatible = "fsl,esdhc";
+		sdhci@2e000 {
+			compatible = "fsl,mpc8377-esdhc", "fsl,mpc8379-esdhc";
 			reg = <0x2e000 0x1000>;
 			interrupts = <42 0x8>;
 			interrupt-parent = <&ipic>;
+			/* Filled in by U-Boot */
+			clock-frequency = <0>;
 		};
 
 		sata@18000 {

arch/powerpc/boot/dts/mpc8378_mds.dts

@@ -313,12 +313,13 @@
 			fsl,descriptor-types-mask = <0x3ab0ebf>;
 		};
 
-		sdhc@2e000 {
-			model = "eSDHC";
-			compatible = "fsl,esdhc";
+		sdhci@2e000 {
+			compatible = "fsl,mpc8378-esdhc", "fsl,mpc8379-esdhc";
 			reg = <0x2e000 0x1000>;
 			interrupts = <42 0x8>;
 			interrupt-parent = <&ipic>;
+			/* Filled in by U-Boot */
+			clock-frequency = <0>;
 		};
 
 		/* IPIC

arch/powerpc/boot/dts/mpc8379_mds.dts

@@ -310,12 +310,13 @@
 			fsl,descriptor-types-mask = <0x3ab0ebf>;
 		};
 
-		sdhc@2e000 {
-			model = "eSDHC";
-			compatible = "fsl,esdhc";
+		sdhci@2e000 {
+			compatible = "fsl,mpc8379-esdhc";
 			reg = <0x2e000 0x1000>;
 			interrupts = <42 0x8>;
 			interrupt-parent = <&ipic>;
+			/* Filled in by U-Boot */
+			clock-frequency = <0>;
 		};
 
 		sata@18000 {