dt-bindings: i2c: apple,i2c: Add apple,t8112-i2c compatible

This block on the Apple M2 is compatible with the existing driver so
just add the per-SoC compatible.

Acked-by: Wolfram Sang <wsa@kernel.org> # for I2C
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Janne Grunau <j@jannau.net>
Signed-off-by: Hector Martin <marcan@marcan.st>