evm: replace hmac_status with evm_status

We will use digital signatures in addtion to hmac.

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
index 7efbf56..880bbee 100644
--- a/security/integrity/integrity.h
+++ b/security/integrity/integrity.h
@@ -37,7 +37,7 @@
 	unsigned char flags;
 	u8 digest[SHA1_DIGEST_SIZE];
 	struct mutex mutex;	/* protects: version, flags, digest */
-	enum integrity_status hmac_status;
+	enum integrity_status evm_status;
 };
 
 /* rbtree tree calls to lookup, insert, delete