Add integritysetup command line tool for the dm-integrity standalone setting.

The dm-integrity target is intended to be used for authenticated
encryption through LUKS and dm-crypt.

It can be used in standalone as well; for this use case there
is a simple configuration utility called integritysetup
(similar to veritysetup to dm-verity).

lib/utils_crypt.h

@@ -33,6 +33,7 @@ struct crypt_device;
 
 int crypt_parse_name_and_mode(const char *s, char *cipher,
 			      int *key_nums, char *cipher_mode);
+int crypt_parse_hash_integrity_mode(const char *s, char *integrity);
 
 void *crypt_safe_alloc(size_t size);
 void crypt_safe_free(void *data);