ARM: dts: sun8i: V3/V3s/S3: Sync from Linux v5.18-rc1

Copy the devicetree source for the V3(s)/S3 SoCs and all existing boards
verbatim from the Linux v5.18-rc1 tag.

This commit also adds the following new board devicetrees:
 - sun8i-s3-elimo-initium.dts
 - sun8i-v3-sl631-imx179.dts

This update should not impact any existing U-Boot functionality.

Signed-off-by: Samuel Holland <samuel@sholland.org>
diff --git a/arch/arm/dts/sun8i-s3-elimo-initium.dts b/arch/arm/dts/sun8i-s3-elimo-initium.dts
new file mode 100644
index 0000000..039677c
--- /dev/null
+++ b/arch/arm/dts/sun8i-s3-elimo-initium.dts
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2020 Matteo Scordino <matteo@elimo.io>
+ */
+
+/dts-v1/;
+#include "sun8i-s3-elimo-impetus.dtsi"
+
+/ {
+	model = "Elimo Initium";
+	compatible = "elimo,initium", "elimo,impetus", "sochip,s3",
+		     "allwinner,sun8i-v3";
+
+	aliases {
+		serial1 = &uart1;
+	};
+};
+
+&uart1 {
+	pinctrl-0 = <&uart1_pg_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&emac {
+	phy-handle = <&int_mii_phy>;
+	phy-mode = "mii";
+	status = "okay";
+};