ima: use new crypto_shash API instead of old crypto_hash

Old crypto hash API internally uses shash API.
Using shash API directly is more efficient.

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>

security/integrity/ima/ima.h

@@ -89,6 +89,7 @@ int ima_calc_template_hash(int template_len, void *template, char *digest);
 int ima_calc_boot_aggregate(char *digest);
 void ima_add_violation(struct inode *inode, const unsigned char *filename,
 		       const char *op, const char *cause);
+int ima_init_crypto(void);
 
 /*
  * used to protect h_table and sha_table