dt-bindings: cpufreq: apple,cluster-cpufreq: Add A7-A11, T2 compatibles

Add compatibles for Apple A7-A11, T2 SoCs.

Apple A7, A8, A8X gets the per-SoC compatible and the A7
"apple,s5l8960x-cluster-cpufreq" compatible.

Apple A9, A9X, A10, A10X, T2, A11 gets the per-SoC compatible, M1
"apple,t8103-cluster-cpufreq" compatible, then the
"apple,cluster-cpufreq" fallback compatible.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>