clk: qcom: gdsc-regulator: add support for QMP-based GDSC enable

Add support for sending a request to AOP via QMP which enables
a GDSC.  This is needed on some targets in order to avoid a NOC
error when enabling some GDSCs (e.g. gpu_cx_gdsc on SM8150).

Change-Id: I89addcb7259f402885890fb60c34cd15a55353cf
Signed-off-by: David Collins <collinsd@codeaurora.org>