[CIFS] change misleading field name

num_auth is really num_subauth in ACL terminology

Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h
index b975ae1..5e7b567 100644
--- a/fs/cifs/cifsacl.h
+++ b/fs/cifs/cifsacl.h
@@ -33,10 +33,9 @@
 
 struct cifs_sid {
 	__u8 revision; /* revision level */
-	__u8 num_auth;
+	__u8 num_subauth;
 	__u8 authority[6];
-	__u32 sub_auth[4];
-	__u32 rid;
+	__u32 sub_auth[0]; /* sub_auth[num_subauth] */
 } __attribute__((packed));
 
 struct cifs_acl {
@@ -54,10 +53,9 @@
 
 struct cifs_ace {
 	__u8 revision; /* revision level */
-	__u8 num_auth;
+	__u8 num_subauth;
 	__u8 authority[6];
-	__u32 sub_auth[4];
-	__u32 rid;
+	__u32 sub_auth[0];
 } __attribute__((packed));
 
 /* everyone */