Like 4436a371 for 37xx, reserve the PSCI area memory region so kernels
can call the code there.
Region address is taken from the ATF code [1] and is 2MiB aligned.

[1] plat/marvell/a8k/common/include/platform_def.h

Signed-off-by: Emmanuel Vadot <m...@freebsd.org>
---
 arch/arm64/boot/dts/marvell/armada-ap806.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/marvell/armada-ap806.dtsi 
b/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
index 073610ac0a53..d8a79bb69de1 100644
--- a/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
@@ -23,6 +23,21 @@
                spi0 = &spi0;
        };
 
+       reserved-memory {
+               #address-cells = <2>;
+               #size-cells = <2>;
+               ranges;
+
+               /*
+                * The PSCI firmware region depicted below is the default one
+                * and should be updated by the bootloader.
+                */
+               psci-area@4000000 {
+                       reg = <0 0x4000000 0 0x200000>;
+                       no-map;
+               };
+       };
+
        psci {
                compatible = "arm,psci-0.2";
                method = "smc";
-- 
2.19.0

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