Add usb otg support for orangepi-zero-plus2 board:
- Add usb_otg node with dr_mode as 'otg'
- USB0-IDDET connected to PA21
- VBUS connected through DCIN which always on

Tested mass storage function.

Signed-off-by: Jagan Teki <ja...@amarulasolutions.com>
---
Note: Anyone please check vbus connection [1]
Since it is connected through DCIN of vcc-5v, I've added vcc-5v0
regulator for the same and attached to usb0_vbus-supply but it is
disabling during kernel boot.
[    1.887854] vcc5v0: disabling

[1] http://linux-sunxi.org/File:ORANGE_PI-ZERO-PLUS2_V1_0.pdf

 .../dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts    | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts 
b/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts
index d349399..7f298ee 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus2.dts
@@ -73,6 +73,10 @@
        };
 };
 
+&ehci0 {
+       status = "okay";
+};
+
 &mmc0 {
        pinctrl-names = "default";
        pinctrl-0 = <&mmc0_pins_a>;
@@ -111,6 +115,10 @@
        status = "okay";
 };
 
+&ohci0 {
+       status = "okay";
+};
+
 &uart0 {
        pinctrl-names = "default";
        pinctrl-0 = <&uart0_pins_a>;
@@ -122,3 +130,13 @@
        pinctrl-0 = <&uart1_pins>, <&uart1_rts_cts_pins>;
        status = "okay";
 };
+
+&usb_otg {
+       dr_mode = "otg";
+       status = "okay";
+};
+
+&usbphy {
+       usb0_id_det-gpios = <&pio 0 21 GPIO_ACTIVE_HIGH>; /* PA21 */
+       status = "okay";
+};
-- 
2.7.4

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