selinux: update filenametr_hash() to use full_name_hash()

Using full_name_hash() instead of partial_name_hash() should result
in cleaner and better performing code.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/ss/policydb.c

@@ -409,16 +409,9 @@ static int roles_init(struct policydb *p)
 static u32 filenametr_hash(const void *k)
 {
 	const struct filename_trans_key *ft = k;
-	unsigned long hash;
-	unsigned int byte_num;
-	unsigned char focus;
+	unsigned long salt = ft->ttype ^ ft->tclass;
 
-	hash = ft->ttype ^ ft->tclass;
-
-	byte_num = 0;
-	while ((focus = ft->name[byte_num++]))
-		hash = partial_name_hash(focus, hash);
-	return hash;
+	return full_name_hash((void *)salt, ft->name, strlen(ft->name));
 }
 
 static int filenametr_cmp(const void *k1, const void *k2)