arm64: dts: tesla: add a specific compatible to MCT on FSD

One compatible is used for the Multi-Core Timer on Tesla FSD SoC, which
is correct but not specific enough.  The MCT blocks have different
number of interrupts, so add a second specific compatible to Tesla FSD.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20220304122424.307885-5-krzysztof.kozlowski@canonical.com