arm64: dts: meson-gx: add ATF BL32 reserved-memory region

stable inclusion
from stable-v5.10.102
commit 605080f19eb7edde039cec7bee1646b2eefeaea2
bugzilla: https://gitee.com/openeuler/kernel/issues/I567K6

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=605080f19eb7edde039cec7bee1646b2eefeaea2

--------------------------------

[ Upstream commit 76577c91 ]

Add an additional reserved memory region for the BL32 trusted firmware
present in many devices that boot from Amlogic vendor u-boot.
Suggested-by: NMateusz Krzak <kszaquitto@gmail.com>
Signed-off-by: NChristian Hewitt <christianshewitt@gmail.com>
Reviewed-by: NNeil Armstrong <narmstrong@baylibre.com>
Reviewed-by: NKevin Hilman <khilman@baylibre.com>
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220126044954.19069-2-christianshewitt@gmail.comSigned-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NYu Liao <liaoyu15@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm64/boot/dts/amlogic/meson-gx.dtsi

@@ -43,6 +43,12 @@
 			no-map;
 		};
 
+		/* 32 MiB reserved for ARM Trusted Firmware (BL32) */
+		secmon_reserved_bl32: secmon@5300000 {
+			reg = <0x0 0x05300000 0x0 0x2000000>;
+			no-map;
+		};
+
 		linux,cma {
 			compatible = "shared-dma-pool";
 			reusable;