clk: qcom: Add clock measurement support for sdxpoorwills

Add support for the debug mux structure for measuring GCC clocks.

CRs-Fixed: 2155384
Change-Id: Ia2fe58957093a6fbb10f07c097adb0b02edd1077
Signed-off-by: Vicky Wallace <vwallace@codeaurora.org>
8 files changed