clk: qcom: gcc-sdm855: Add debug measurement support for shared clocks

Add support to measure the rate of shared clock resources that
the Linux clock driver does not control directly.

Change-Id: Ib49bd0683067967821beb4b03bf094a3d8bd327c
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>