clk: qcom: clk-cpu-osm: Remove writes to ITM registers

The Gold and Silver control ITM registers will be written to
and configured by an entity outside of HLOS. Remove the
accesses in the HLOS clock driver.

Change-Id: Ie5f442bb9bf34718ecca8424d255965f951c76fc
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>