arm64: dts: freescale: imx95-toradex-smarc: reserve memory for security enclavetoradex_6.6-2.2.x-imx

The security enclave firmware runs on the Cortex-M33 core, and the
corresponding Linux driver on the Cortex-A core expects responses to
requests to be returned via a shared memory region in DRAM.

Since the Cortex-M33 cannot access the entire DDR memory space, reserve
a Cortex-M33 accessible memory region for the security enclave firmware.

The address match the same address used by U-Boot.

Upstream-Status: Pending
Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>

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