Cape: Add dtso to minimal cape build option.

Without the dtso, the default Linux dts for MSS GPIO2 is used causing
non-connected P8 pins being reported as usable.

script_support/components/CAPE/NONE/device-tree-overlay/cape-gpios.dtso

+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Copyright (c) 2020-2021 Microchip Technology Inc */
+
+/dts-v1/;
+/plugin/;
+
+&{/chosen} {
+	overlays {
+		MINIMAL-CAPE-GATEWARE = "Mon Oct  2 18:00:17 2023";
+	};
+};
+
+&gpio2 {
+	interrupts = <53>, <53>, <53>, <53>,
+		     <53>, <53>, <53>, <53>,
+		     <53>, <53>, <53>, <53>,
+		     <53>, <53>, <53>, <53>,
+		     <53>, <53>, <53>, <53>,
+		     <53>, <53>, <53>, <53>,
+		     <53>, <53>, <53>, <53>,
+		     <53>, <53>, <53>, <53>;
+	gpio-line-names = "P8_3_USER_LED_0", "P8_4_USER_LED_1", "P8_5_USER_LED_2",
+					"P8_6_USER_LED_3", "P8_7_USER_LED_4", "P8_8_USER_LED_5",
+					"P8_9_USER_LED_6", "P8_10_USER_LED_7", "P8_11_USER_LED_8",
+					"P8_12_USER_LED_9", "P8_13_USER_LED_10", "P8_14_USER_LED_11",
+					"", "", "", "", "",
+					"", "", "",	"", "",
+					"", "", "", "", "",
+					"",
+					"M2_W_DISABLE1", "M2_W_DISABLE2",
+					"VIO_ENABLE", "SD_DET";
+	status = "okay";
+
+	vio_enable {
+		gpio-hog;
+		gpios = <30 30>;
+		output_high;
+		line-name = "VIO_ENABLE";
+	};
+
+	sd_det {
+		gpio-hog;
+		gpios = <31 31>;
+		input;
+		line-name = "SD_DET";
+	};
+};
+
+&mmuart4 {
+	status = "okay";
+	symlink = "bone/uart/4";
+};