arm/dt: zinc: Add rtb device

RTB is a logging infrastructure used to trace certain events.
Add the device to support logging for the zinc target.

Change-Id: I611558b30206575cce6ca5a0ceb4b2c06496b1d7
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
diff --git a/arch/arm/boot/dts/msmzinc.dtsi b/arch/arm/boot/dts/msmzinc.dtsi
index d981909..8281ff5 100644
--- a/arch/arm/boot/dts/msmzinc.dtsi
+++ b/arch/arm/boot/dts/msmzinc.dtsi
@@ -74,7 +74,13 @@
         qcom,msm-imem@fe805000 {
                 compatible = "qcom,msm-imem";
                 reg = <0xfe805000 0x1000>; /* Address and size of IMEM */
-        };
+	};
+
+	qcom,msm-rtb {
+		compatible = "qcom,msm-rtb";
+		qcom,memory-reservation-type = "EBI1";
+		qcom,memory-reservation-size = <0x100000>; /* 1M EBI1 buffer */
+	};
 
 	qcom,ion {
 		compatible = "qcom,msm-ion";