cifs: set oparms.create_options rather than or'ing in CREATE_OPEN_BACKUP_INTENT

Currently oparms.create_options is uninitialized and the code is logically
or'ing in CREATE_OPEN_BACKUP_INTENT onto a garbage value of
oparms.create_options from the stack.  Fix this by just setting the value
rather than or'ing in the setting.

Detected by CoverityScan, CID#1447220 ("Unitialized scale value")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>

fs/cifs/smb2ops.c

@@ -1339,7 +1339,7 @@ get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
 	xid = get_xid();
 
 	if (backup_cred(cifs_sb))
-		oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
+		oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
 	else
 		oparms.create_options = 0;