1. Reconfigure DFS clock divider to divide by 4.
2. OCP_WARN_CPU2 was repurposed for DFS usage. Since SOFT_OCP_WARN_CPU2
was not used by BCL, it will be repurposed to replace OCP_WARN_CPU2.
Bug: 223909471
Test: Local test to verify register value
Signed-off-by: George Lee <geolee@google.com>
Change-Id: Ie9960c30b102d67f0ade156631386b656ff82790