[kmac] Revise Assertion Name
[kmac] Revise Assertion Name

Assertion name from SelStayTwoCycleIf1_A to SelStayTwoCycleIfTrue_A

Signed-off-by: Eunchan Kim <cb7bc7ceb22698f298c67faa994fd9ddf3cab298@opentitan.org>

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