clk: qcom: smd-rpmcc: Add msm8974 clocks

This adds all RPM based clocks for msm8974, except cxo and
gfx3d_clk_src.

Tested-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>