ARM: dts: sun7i: Sync from Linux v5.18-rc1

Copy the devicetree source for the A20 SoC and all existing boards
verbatim from the Linux v5.18-rc1 tag.

This commit also adds the following new board devicetrees:
 - sun7i-a20-haoyu-marsboard.dts
 - sun7i-a20-linutronix-testbox-v2.dts
 - sun7i-a20-olinuxino-lime-emmc.dts

This update includes changes to the USB PHY detection GPIO properties
which are needed to convert that driver to use the DM GPIO framework.

Signed-off-by: Samuel Holland <samuel@sholland.org>
[Andre: fix Mele M5 U-Boot only DT]
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/arch/arm/dts/sun7i-a20-olinuxino-lime-emmc.dts b/arch/arm/dts/sun7i-a20-olinuxino-lime-emmc.dts
new file mode 100644
index 0000000..033cab3
--- /dev/null
+++ b/arch/arm/dts/sun7i-a20-olinuxino-lime-emmc.dts
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2020 Olimex Ltd.
+ *   Author: Stefan Mavrodiev <stefan@olimex.com>
+ */
+
+#include "sun7i-a20-olinuxino-lime.dts"
+
+/ {
+	model = "Olimex A20-OLinuXino-LIME-eMMC";
+	compatible = "olimex,a20-olinuxino-lime-emmc", "allwinner,sun7i-a20";
+
+	mmc2_pwrseq: pwrseq {
+		compatible = "mmc-pwrseq-emmc";
+		reset-gpios = <&pio 2 16 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&mmc2 {
+	vmmc-supply = <&reg_vcc3v3>;
+	vqmmc-supply = <&reg_vcc3v3>;
+	bus-width = <4>;
+	non-removable;
+	mmc-pwrseq = <&mmc2_pwrseq>;
+	status = "okay";
+
+	emmc: emmc@0 {
+		reg = <0>;
+		compatible = "mmc-card";
+		broken-hpi;
+	};
+};