ARM: UniPhier: replace "usb-ehci" with "generic-ehci"

EHCI host controllers have a common register interface.
We may wish to implement a generic EHCI driver someday.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/arch/arm/dts/uniphier-ph1-pro4.dtsi b/arch/arm/dts/uniphier-ph1-pro4.dtsi
index 49e375e..3f1001b 100644
--- a/arch/arm/dts/uniphier-ph1-pro4.dtsi
+++ b/arch/arm/dts/uniphier-ph1-pro4.dtsi
@@ -1,7 +1,7 @@
 /*
  * Device Tree Source for UniPhier PH1-Pro4 SoC
  *
- * Copyright (C) 2014 Panasonic Corporation
+ * Copyright (C) 2014-2015 Panasonic Corporation
  *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
@@ -120,13 +120,13 @@
 		};
 
 		usb0: usb@5a800100 {
-			compatible = "panasonic,uniphier-ehci", "usb-ehci";
+			compatible = "panasonic,uniphier-ehci", "generic-ehci";
 			status = "disabled";
 			reg = <0x5a800100 0x100>;
 		};
 
 		usb1: usb@5a810100 {
-			compatible = "panasonic,uniphier-ehci", "usb-ehci";
+			compatible = "panasonic,uniphier-ehci", "generic-ehci";
 			status = "disabled";
 			reg = <0x5a810100 0x100>;
 		};