usb: UniPhier: support OF configuration

If CONFIG_OF_CONTROL is defined, search device tree nodes that are
compatible with "panasonic,uniphier-ehci" and take the base address
from their "reg" property.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/dts/uniphier-ph1-pro4.dtsi b/arch/arm/dts/uniphier-ph1-pro4.dtsi
index b53fbc5..dd84269 100644
--- a/arch/arm/dts/uniphier-ph1-pro4.dtsi
+++ b/arch/arm/dts/uniphier-ph1-pro4.dtsi
@@ -62,5 +62,17 @@
 			reg = <0x54006b00 0x20>;
 			clock-frequency = <73728000>;
 		};
+
+		usb0: usb@5a800100 {
+			compatible = "panasonic,uniphier-ehci", "usb-ehci";
+			status = "disabled";
+			reg = <0x5a800100 0x100>;
+		};
+
+		usb1: usb@5a810100 {
+			compatible = "panasonic,uniphier-ehci", "usb-ehci";
+			status = "disabled";
+			reg = <0x5a810100 0x100>;
+		};
 	};
 };