clk: uniphier: add clock data for UniPhier SoCs

Add clock data arrays for all UniPhier SoCs with a binding document.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>