MAINTAINERS: arm64: tesla: correct pattern for directory

The path is actually not a pattern but a directory, so correct it to be
effective.

Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20230113104050.30856-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>