1)Added WAIT_FOR_COMPLETION

2)Updated to use only single instance for crypt for all crypto operations.
3)Fix for ecdsa_verify function failing due to incorrect public key and signature.
4)Code clean-up

Author: ying-css

src/platform/Infineon/crypto/trustm/CHIPCryptoPALHsm_P256_trustm.cpp

@@ -278,7 +278,6 @@ CHIP_ERROR P256PublicKey::ECDSA_validate_hash_signature(const uint8_t * hash, si
     MutableByteSpan out_der_sig_span(signature_trustm, signature_trustm_len);
 
     uint8_t hash_length_u8            = static_cast<uint8_t>(hash_length);
-    uint16_t signature_trustm_len_u16 = static_cast<uint16_t>(signature_trustm_len);
 
     VerifyOrReturnError(hash != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
     VerifyOrReturnError(hash_length > 0, CHIP_ERROR_INVALID_ARGUMENT);
@@ -292,7 +291,7 @@ CHIP_ERROR P256PublicKey::ECDSA_validate_hash_signature(const uint8_t * hash, si
 
     signature_trustm_len = out_der_sig_span.size();
     // ECC verify
-    return_status = trustm_ecdsa_verify((uint8_t *) hash, hash_length_u8, (uint8_t *) signature_trustm, signature_trustm_len_u16,
+    return_status = trustm_ecdsa_verify((uint8_t *) hash, hash_length_u8, (uint8_t *) signature_trustm, signature_trustm_len,
                                         (uint8_t *) bytes, (uint8_t) kP256_PublicKey_Length);
 
     VerifyOrExit(return_status == OPTIGA_LIB_SUCCESS, error = CHIP_ERROR_INTERNAL);