ARM: dts: msm: Add CX regulator Phandle to MDP node

Add the CX regulator Phandle to MDP node for
8x26 target to vote it for smart panel usage scenario.

Change-Id: I178acb3a440ed4bb697df868ebf3ba56441d24d1
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
diff --git a/arch/arm/boot/dts/msm8226-mdss.dtsi b/arch/arm/boot/dts/msm8226-mdss.dtsi
index c7a4eee..a82b0af 100644
--- a/arch/arm/boot/dts/msm8226-mdss.dtsi
+++ b/arch/arm/boot/dts/msm8226-mdss.dtsi
@@ -37,6 +37,7 @@
 		qcom,mdss-intf-off = <0x00000000 0x00021300>;
 		qcom,mdss-rot-block-size = <64>;
 		qcom,mdss-smp-mb-per-pipe = <2>;
+		vdd-cx-supply = <&pm8226_s1_corner>;
 
 		qcom,vbif-settings = <0x004 0x00000001>,
 				     <0x0D8 0x00000707>,