arm/dt: Add regulator properties to DSI device.

DSI controller and the DSI PLL are powered by
these regulators. Fix the memory map region
to include only DSI-0 controller related registers.

Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>
(cherry picked from commit 7632f672ac493a9e4710f8b688fbf0309cb23021)

Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>
(cherry picked from commit 287860aa2eda50956f1102c1793e1194b4d0dbb9)

Change-Id: Ia1a7e0da99eb6ade86e9c04fc11fb794ed95ac3c
Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>
diff --git a/arch/arm/boot/dts/msm8974-mdss.dtsi b/arch/arm/boot/dts/msm8974-mdss.dtsi
index d14e014..7c36bcf 100644
--- a/arch/arm/boot/dts/msm8974-mdss.dtsi
+++ b/arch/arm/boot/dts/msm8974-mdss.dtsi
@@ -20,8 +20,11 @@
 
 	mdss_dsi: qcom,mdss_dsi@fd922800 {
 		compatible = "qcom,msm-mdss-dsi";
-		reg = <0xfd922800 0x5ac>,
+		reg = <0xfd922800 0x600>,
 			<0xfd8c2000 0x01000>;
+		vdd-supply = <&pm8941_l22>;
+		vdd_io-supply = <&pm8941_l12>;
+		vreg-supply = <&pm8941_l2>;
 	};
 
 	qcom,mdss_wb_panel {