[sram/dv] Fix init followed by sram transactions
[sram/dv] Fix init followed by sram transactions

Sram init is actually a bunch of write, which may affect the next
transactions.
Update scb to consider init to trigger 1<<AddrWidth write strobe

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

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