This adds the following apple,t6001 platform:

- apple,j375c - Mac Studio (M1 Max, 2022)

And the initial apple,t6002 platform:

- apple,j375d - Mac Studio (M1 Ultra, 2022)
Signed-off-by: Janne Grunau <j@jannau.net>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>