dir-300-b1: sdmod through spi-gpio

For post https://woskit.blogspot.com/2018/11/dir-300-b1.html

Signed-off-by: Nikita Vostokov <yawosk@yandex.com>

target/linux/ramips/dts/rt3050_dlink_dir-300-b1.dts

@@ -62,27 +62,11 @@
 			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_RESTART>;
 		};
-
-		wps {
-			label = "wps";
-			gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_WPS_BUTTON>;
-		};
 	};
 
 	leds {
 		compatible = "gpio-leds";
 
-		status {
-			label = "dir-300-b1:amber:status";
-			gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
-		};
-
-		led_status_green: status2 {
-			label = "dir-300-b1:green:status";
-			gpios = <&gpio0 9 GPIO_ACTIVE_LOW>;
-		};
-
 		wan {
 			label = "dir-300-b1:amber:wan";
 			gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
@@ -92,12 +76,26 @@
 			label = "dir-300-b1:green:wan";
 			gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
 		};
-
-		wps {
-			label = "dir-300-b1:blue:wps";
-			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
-		};
 	};
+
+	spi {
+		compatible = "spi-gpio";
+		#address-cells = <0x1>;
+		ranges;
+
+		gpio-sck  = <&gpio0  8 GPIO_ACTIVE_LOW>;
+		gpio-miso = <&gpio0 13 GPIO_ACTIVE_LOW>;
+		gpio-mosi = <&gpio0  9 GPIO_ACTIVE_LOW>;
+		cs-gpios  = <&gpio0  0 GPIO_ACTIVE_LOW>;
+		num-chipselects = <1>;
+
+		mmc-slot@0 {
+			compatible = "mmc-spi-slot";
+			reg = <0>;
+			voltage-ranges = <3300 3300>;
+			spi-max-frequency = <10000000>;
+                };
+        };
 };
 
 &state_default {