ARM: dts: sun7i: Remove card detect pull-up

Boards usually have an external pull-up on the card-detect signal, so
there's no need to add another one.

This also removes a DTC warning.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun7i-a20-orangepi.dts

@@ -128,7 +128,7 @@
 
 &mmc0 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin_orangepi>;
+	pinctrl-0 = <&mmc0_pins_a>;
 	vmmc-supply = <&reg_vcc3v3>;
 	bus-width = <4>;
 	cd-gpios = <&pio 7 10 GPIO_ACTIVE_LOW>; /* PH10 */
@@ -145,12 +145,6 @@
 		function = "gpio_in";
 		bias-pull-up;
 	};
-
-	mmc0_cd_pin_orangepi: mmc0_cd_pin@0 {
-		pins = "PH10";
-		function = "gpio_in";
-		bias-pull-up;
-	};
 };
 
 &reg_dcdc2 {