omap4: make musb probeable by simple bus

Like other peripherals important for booting,
do not rely on ti-sysc compatibility alone

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
diff --git a/arch/arm/dts/omap4-u-boot.dtsi b/arch/arm/dts/omap4-u-boot.dtsi
index 4a6bafd..d476bfb 100644
--- a/arch/arm/dts/omap4-u-boot.dtsi
+++ b/arch/arm/dts/omap4-u-boot.dtsi
@@ -17,6 +17,14 @@
 			compatible = "simple-bus";
 		};
 	};
+
+	segment@80000 {
+		/* USB OTG */
+		target-module@2b000 {
+			compatible = "simple-bus";
+		};
+	};
+
 };
 
 &l4_per {