Change the type of 'crp_opaque' from caddr_t to void *.

Opaque pointers should be void *.  Note that this does not go through
the tree removing all of the now-unnecessary casts.

Reviewed by:	kib
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D13848

sys/opencrypto/cryptodev.h

@@ -426,7 +426,7 @@ struct cryptop {
 					 */
 
 	caddr_t		crp_buf;	/* Data to be processed */
-	caddr_t		crp_opaque;	/* Opaque pointer, passed along */
+	void *		crp_opaque;	/* Opaque pointer, passed along */
 	struct cryptodesc *crp_desc;	/* Linked list of processing descriptors */
 
 	int (*crp_callback)(struct cryptop *); /* Callback function */