clk: qcom: debugcc-sm8150: Add measurement support for CPU clocks on SM8150

Add support to measure the rate of the l3, silver, gold,
and gold plus clock domains on SM8150.

Change-Id: Iec24b9d00ce302e7d19d46a4129c03b4a312f9a7
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>