clk: qcom: Add WCSS gcc clock control for QCS404

Add support for the WCSS QDSP gcc clock control used on qcs404
based devices. This would allow wcss remoteproc driver to control
the required gcc clocks to bring the subsystem out of reset.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>