ARM: dts: stm32: Enable sdio1 for stm32f746-eval

Adds SDIO related DT nodes for stm32f746-eval board.

broken-cd property is needed as card detect signal is
connected to a GPIO expander which is not yet supported
in kernel linux.
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32746g-eval.dts

@@ -91,6 +91,13 @@ usbotg_hs_phy: usb-phy {
 		clocks = <&rcc 0 STM32F7_AHB1_CLOCK(OTGHSULPI)>;
 		clock-names = "main_clk";
 	};
+
+	mmc_vcard: mmc_vcard {
+		compatible = "regulator-fixed";
+		regulator-name = "mmc_vcard";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
 };
 
 &clk_hse {
@@ -113,6 +120,16 @@ &rtc {
 	status = "okay";
 };
 
+&sdio1 {
+	status = "okay";
+	vmmc-supply = <&mmc_vcard>;
+	broken-cd;
+	pinctrl-names = "default", "opendrain";
+	pinctrl-0 = <&sdio_pins_a>;
+	pinctrl-1 = <&sdio_pins_od_a>;
+	bus-width = <4>;
+};
+
 &usart1 {
 	pinctrl-0 = <&usart1_pins_a>;
 	pinctrl-names = "default";