arm64: dts: Add Arm corstone1000 platform support

arm64: dts: Add Arm corstone1000 platform support

Corstone1000 is a platform from arm, which includes pre
verified Corstone SSE710 sub-system that combines Cortex-A and
Cortex-M processors [0].

These device trees contains the necessary bits to support the
Corstone 1000 FVP (Fixed Virtual Platform) [1] and the
FPGA MPS3 board Cortex-A35 implementation at Cortex-A35 host
side of this platform. [2]

0: https://developer.arm.com/documentation/102360/0000
1: https://developer.arm.com/tools-and-software/open-source-software/arm-platforms-software/arm-ecosystem-fvps
2: https://developer.arm.com/documentation/dai0550/c/

Link: https://lore.kernel.org/r/20220408131922.3864348-3-rui.silva@linaro.org
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>