arm64: Layerscape: Survive LPI one-way reset workaround

The workaround of LPI one-way reset issue is broken by the series:
https://patchwork.ozlabs.org/project/uboot/list/?series=192398

This patch is to add DT node for GIC RD tables and create corresponding
reserved-memory node in kernel DT to fix it.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/arch/arm/dts/fsl-lx2160a.dtsi b/arch/arm/dts/fsl-lx2160a.dtsi
index dee1e2f..37a4f39 100644
--- a/arch/arm/dts/fsl-lx2160a.dtsi
+++ b/arch/arm/dts/fsl-lx2160a.dtsi
@@ -43,6 +43,12 @@
 		interrupts = <1 9 0x4>;
 	};
 
+	gic_lpi_base: syscon@0x80000000 {
+		compatible = "gic-lpi-base";
+		reg = <0x0 0x80000000 0x0 0x200000>;
+		max-gic-redistributors = <16>;
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts = <1 13 0x8>, /* Physical Secure PPI, active-low */