[dv/clkmgr] Keep count check assertions enabled
[dv/clkmgr] Keep count check assertions enabled

Remove the sec_cm_fi_ctrl_svas function: it was added as a workaround,
and is no longer needed.

Signed-off-by: Guillermo Maturana <085716c7110d3f31793f7d964c2e5fd26da1c550@google.com>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan