msm: mdss: carve out memory for framebuffer

Use carved out memory allocated exclusively for framebuffer
instead of using up memory from ion pool.

Change-Id: I4b248a21380a3ef737fe2fd8eed6de9747fe47c7
Signed-off-by: Adrian Salido-Moreno <adrianm@codeaurora.org>
diff --git a/arch/arm/boot/dts/msm8974-mdss.dtsi b/arch/arm/boot/dts/msm8974-mdss.dtsi
index ee5836c..ca98706 100644
--- a/arch/arm/boot/dts/msm8974-mdss.dtsi
+++ b/arch/arm/boot/dts/msm8974-mdss.dtsi
@@ -18,6 +18,8 @@
 		reg-names = "mdp_phys", "vbif_phys";
 		interrupts = <0 72 0>;
 		vdd-supply = <&gdsc_mdss>;
+		qcom,memory-reservation-type = "EBI1"; /* reserve EBI memory */
+		qcom,memory-reservation-size = <0x800000>; /* size 8MB */
 	};
 
 	mdss_dsi: qcom,mdss_dsi@fd922800 {