[C57][DTS][C57-32] Add support to eMMC and USB 3.0

Add to the device tree the required nodes to load the file system
from USB 3.0 or eMMC.

arch/arm64/boot/dts/seco/seco-imx8qxp-c57.dts

@@ -33,6 +33,7 @@
 		serial1 = &lpuart1;
 		serial2 = &lpuart2;
 		serial3 = &lpuart3;
+		mmc0 = &usdhc1;
 	};
 
 	cpus {
@@ -86,6 +87,54 @@
 				IMX8QXP_FLEXCAN2_RX_ADMA_UART3_RX	0x06000020
 			>;
 		};
+
+        pinctrl_usdhc1: usdhc1grp {
+			fsl,pins = <
+				IMX8QXP_EMMC0_CLK_CONN_EMMC0_CLK		0x06000041
+				IMX8QXP_EMMC0_CMD_CONN_EMMC0_CMD		0x00000021
+				IMX8QXP_EMMC0_DATA0_CONN_EMMC0_DATA0	0x00000021
+				IMX8QXP_EMMC0_DATA1_CONN_EMMC0_DATA1	0x00000021
+				IMX8QXP_EMMC0_DATA2_CONN_EMMC0_DATA2	0x00000021
+				IMX8QXP_EMMC0_DATA3_CONN_EMMC0_DATA3	0x00000021
+				IMX8QXP_EMMC0_DATA4_CONN_EMMC0_DATA4	0x00000021
+				IMX8QXP_EMMC0_DATA5_CONN_EMMC0_DATA5	0x00000021
+				IMX8QXP_EMMC0_DATA6_CONN_EMMC0_DATA6	0x00000021
+				IMX8QXP_EMMC0_DATA7_CONN_EMMC0_DATA7	0x00000021
+				IMX8QXP_EMMC0_STROBE_CONN_EMMC0_STROBE	0x00000041
+			>;
+		};
+
+		pinctrl_usdhc1_100mhz: usdhc1grp100mhz {
+			fsl,pins = <
+				IMX8QXP_EMMC0_CLK_CONN_EMMC0_CLK		0x06000041
+				IMX8QXP_EMMC0_CMD_CONN_EMMC0_CMD		0x00000021
+				IMX8QXP_EMMC0_DATA0_CONN_EMMC0_DATA0	0x00000021
+				IMX8QXP_EMMC0_DATA1_CONN_EMMC0_DATA1	0x00000021
+				IMX8QXP_EMMC0_DATA2_CONN_EMMC0_DATA2	0x00000021
+				IMX8QXP_EMMC0_DATA3_CONN_EMMC0_DATA3	0x00000021
+				IMX8QXP_EMMC0_DATA4_CONN_EMMC0_DATA4	0x00000021
+				IMX8QXP_EMMC0_DATA5_CONN_EMMC0_DATA5	0x00000021
+				IMX8QXP_EMMC0_DATA6_CONN_EMMC0_DATA6	0x00000021
+				IMX8QXP_EMMC0_DATA7_CONN_EMMC0_DATA7	0x00000021
+				IMX8QXP_EMMC0_STROBE_CONN_EMMC0_STROBE	0x00000041
+			>;
+		};
+
+		pinctrl_usdhc1_200mhz: usdhc1grp200mhz {
+			fsl,pins = <
+				IMX8QXP_EMMC0_CLK_CONN_EMMC0_CLK		0x06000041
+				IMX8QXP_EMMC0_CMD_CONN_EMMC0_CMD		0x00000021
+				IMX8QXP_EMMC0_DATA0_CONN_EMMC0_DATA0	0x00000021
+				IMX8QXP_EMMC0_DATA1_CONN_EMMC0_DATA1	0x00000021
+				IMX8QXP_EMMC0_DATA2_CONN_EMMC0_DATA2	0x00000021
+				IMX8QXP_EMMC0_DATA3_CONN_EMMC0_DATA3	0x00000021
+				IMX8QXP_EMMC0_DATA4_CONN_EMMC0_DATA4	0x00000021
+				IMX8QXP_EMMC0_DATA5_CONN_EMMC0_DATA5	0x00000021
+				IMX8QXP_EMMC0_DATA6_CONN_EMMC0_DATA6	0x00000021
+				IMX8QXP_EMMC0_DATA7_CONN_EMMC0_DATA7	0x00000021
+				IMX8QXP_EMMC0_STROBE_CONN_EMMC0_STROBE	0x00000041
+			>;
+		};
 	};
 };
 
@@ -106,4 +155,27 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_lpuart3>;
 	status = "okay";
+};
+
+&usdhc1 {
+	pinctrl-names = "default", "state_100mhz", "state_200mhz";
+	pinctrl-0 = <&pinctrl_usdhc1>;
+	pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
+	pinctrl-2 = <&pinctrl_usdhc1_200mhz>;
+	bus-width = <8>;
+	non-removable;
+	status = "okay";
+};
+
+&usb3_phy {
+	status = "okay";
+};
+
+&usbotg3 {
+	status = "okay";
+};
+
+&usbotg3_cdns3 {
+    dr_mode = "host";
+    status = "okay";
 };
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