dt-bindings: clock: Add GDSC in SDX55 GCC

Add GDSC instances in SDX55 GCC block.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20201126072844.35370-6-manivannan.sadhasivam@linaro.org


Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>