ARM: dts: Add dtsi files for AM3703, AM3715 and DM3725

DM3730 is considered as omap36xx.dtsi, while the rest has:
     DM3730 | DM3725 | AM3715 | AM3703
IVA    X    |   X    |        |
SGX    X    |        |   X    |
Where X is "supported"

Signed-off-by: André Hentschel <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>

Author: AndreRH

arch/arm/boot/dts/am3703.dtsi

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 André Hentschel <[email protected]>
+ */
+
+#include "omap36xx.dtsi"
+
+&iva {
+	status = "disabled";
+};
+
+&sgx_module {
+	status = "disabled";
+};

arch/arm/boot/dts/am3715.dtsi

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 André Hentschel <[email protected]>
+ */
+
+#include "omap36xx.dtsi"
+
+&iva {
+	status = "disabled";
+};

arch/arm/boot/dts/dm3725.dtsi

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 André Hentschel <[email protected]>
+ */
+
+#include "omap36xx.dtsi"
+
+&sgx_module {
+	status = "disabled";
+};