ARM: dts: msm: Increase SMP block restriction for 8x26

Change SMP block allocation per pipe restriction from 2 to 4.
This avoids underruns observed in few usecases on targets
having high resolution panels like 1200p.

Change-Id: Id439ea711617da2292e8d7c388766b6cbda1b89d
Signed-off-by: Mayank Chopra <makchopra@codeaurora.org>
diff --git a/arch/arm/boot/dts/msm8226-mdss.dtsi b/arch/arm/boot/dts/msm8226-mdss.dtsi
index 3e2507ff..e2891d1 100644
--- a/arch/arm/boot/dts/msm8226-mdss.dtsi
+++ b/arch/arm/boot/dts/msm8226-mdss.dtsi
@@ -36,7 +36,7 @@
 		qcom,mdss-wb-off = <0x00011100 0x00013100>;
 		qcom,mdss-intf-off = <0x00000000 0x00021300>;
 		qcom,mdss-rot-block-size = <64>;
-		qcom,mdss-smp-mb-per-pipe = <2>;
+		qcom,mdss-smp-mb-per-pipe = <4>;
 		vdd-cx-supply = <&pm8226_s1_corner>;
 
 		qcom,vbif-settings = <0x004 0x00000001>,