[keymgr/dv] Fix shadow_reg_update_error_with_csr_rw
[keymgr/dv] Fix shadow_reg_update_error_with_csr_rw

Don't do operation in shadow_reg_errors_with_csr_rw, as the
csr_rw_seq runs in parallel and issueing an operation affects CSR access.

Signed-off-by: Weicai Yang <4fa8c7762ee4da95e3dee7dae2c3263ea16637f9@google.com>

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