clk: qcom: Add DT bindings for ipq8074 gcc clock controller

Add the compatible strings and the include file for ipq8074 gcc
clock controller.

Acked-by: Rob Herring <robh@kernel.org> (bindings)
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>