arm64: dts: qcom: SC7280: Add rpmhcc clock controller node

Add rpmhcc clock controller node for SC7280. Also add references to
rpmhcc clocks in gcc.

Signed-off-by: Taniya Das <tdas@codeaurora.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/1615461961-17716-7-git-send-email-rnayak@codeaurora.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>