ARM: dts: disable mmc by default and enable when needed for dm814x

This patch disable mmc nodes by default in the dm814x.dtsi and
enable only when needed on a given dts

v2: Disable un-used mmc nodes on the related boards dts files
 instead of from the included SOC dts
Signed-off-by: Nicolas Chauvet <kwizart@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dm8148-evm.dts

@@ -93,6 +93,10 @@ partition@0x780000 {
 	};
 };
 
+&mmc1 {
+        status = "disabled";
+};
+
 &mmc2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&sd1_pins>;
@@ -101,6 +105,10 @@ &mmc2 {
 	cd-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
 };
 
+&mmc3 {
+        status = "disabled";
+};
+
 &pincntl {
 	sd1_pins: pinmux_sd1_pins {
 		pinctrl-single,pins = <

arch/arm/boot/dts/dm8148-t410.dts

@@ -45,6 +45,14 @@ &cpsw_emac1 {
 	phy-mode = "rgmii";
 };
 
+&mmc1 {
+	status = "disabled";
+};
+
+&mmc2 {
+	status = "disabled";
+};
+
 &mmc3 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&sd2_pins>;