[BUG] After Product-Debug Unlock, KAT Test(SHA ACC) error occurred

[daeyoungkim-87]

Hello. caliptra team

RTL : Caliptra SS 2.1.1
SW : Caliptra ROM 2.1 RC1

During Caliptra ROM boot initialization in Lifecycle PROD state, after completing ECDSA and MLDSA authentication to enter Debug-mode, the KAT test outputs the error "DRIVER_SHA2_512_384ACC_UNEXPECTED_ACQUIRED_LOCK_STATE" during ROM boot.

It appears there is an issue where the SHA ACC's Lock value is not released from 0 after executing line 149 in common/src/debug_unlock.rs.
When the sha_acc lock is manually modified to 1 in the code, it operates normally.

caliptra-sw/common/src/debug_unlock.rs

Line 149 in 5dd8a99

acc_op.digest_384(

Please review this. Thank you.