Document that Stratix10 clock bindings, and add the clock header file. The
clock header is an enumeration of all the different clocks on the Stratix10
platform.
Signed-off-by: NDinh Nguyen <dinguyen@kernel.org>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NStephen Boyd <sboyd@kernel.org>