[sram, dv] fix smoke test not found error
[sram, dv] fix smoke test not found error

Fixed this error from dvsim
> ERROR: [Modes] Test "sram_ctrl_ret_smoke" added to regression "smoke" not found!

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

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