arm64: dts: freescale: imx93: Add Ethos-U65 NPU and SRAM nodes

arm64: dts: freescale: imx93: Add Ethos-U65 NPU and SRAM nodes

i.MX93 contains an Arm Ethos-U65 NPU. The NPU uses the internal SRAM for
temporary buffers. The SRAM is larger than 96KB, but that is all that is
available to non-secure world.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com> # Tested on a NXP
Signed-off-by: Frank Li <Frank.Li@nxp.com>