[dv/hmac] increase FSM reset coverage
[dv/hmac] increase FSM reset coverage

Increase nightly hmac reset related FSM coverage by increasing the seed
for hmac_stress_all_with_rand_reset seq.

Signed-off-by: Cindy Chen <399ad771a111eac8923348b1e2af093034e5d4f1@google.com>

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